Low-friction Carbo AirBlocks® are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an excellent choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets, as well as for controls such as cunninghams and internal boom outhauls on larger boats.

Sheave Ø (mm)40 mm

Length (mm)115 mm

Weight (g)125 g

Shackle pin Ø (mm)4 mm

Maximum line Ø (mm)6mm

Maximum working load (kg) 204

Breaking load (kg) 680

Please see below for a list of supplier sizing guides. If you have any issues, please don't hesitate to get in touch. We're here to help.

If we are missing a supplier, please send us an email and we'd be happy to source the correct sizing guide for you.

We offer free shipping to all addresses in the Republic of Ireland and Northern Ireland for orders over €80.00 (large, bulky and heavy items like kayaks and boats are excluded from free shipping). Orders under €80.00 will be charged a flat rate of €8.00.

Orders are shipped with both DPD Couriers and An Post.

All orders received before 12pm will be shipped the same day where possible (Monday-Friday). Orders after this time will be shipped the next day. Once the item is shipped the approximate delivery time is 1-2 days

You will receive a tracking number when your items are sent. This tracking will show updates once your order has been collected by our couriers.

Delays may be experienced during certain times of the year and if this is the case we will contact you as soon as possible via email.

We reserve the right to change these conditions for exceptionally large or heavy items, items of a hazardous nature or if an item has run out of stock and has to be specially ordered. We will keep you posted of any changes to the best of our ability.

We offer shipping to all addresses in the United Kingdom for a flat rate of €24.95. We may not be able to ship large, bulky or heavy items. Please call for such items. Please note customs charges may apply.

International Shipping Charges

EU Near

Order Value	Shipping Charge
€1.00 - €99.99	€14.95
€100 - €299.99	€17.95
€300 and up	Free

EU Mid

Order Value	Shipping Charge
€1.00 - €99.99	€19.95
€100 - €199.99	€19.95
€200 - €449.99	€24.95
€450 and up	Free

EU Far

Order Value	Shipping Charge
€1.00 - €199.99	€35.00
€200 - €499.99	€40.00
€500 and up	Free

Terms & Conditions - Please note that any items of exceptional size (volume, weight, length) may require a surcharge. In this event we will contact you in advance for approval.

Certain items of extraordinary nature (Paint, Oils, Epoxy etc) may not be possible to ship depending on your location. In the even of an order being unsuitable for shipping we will refund your order immediately and contact you to confirm cancellation of your order.

We are unable to ship any liquids, paints, oils or hazardous goods internationally.

We reserve the right to change these conditions for exceptionally large or heavy items or items of a hazardous nature. We will keep you posted of any changes to the best of our ability.

Inclusion of any product on our website is not a guarantee of it being in stock at the time of ordering. We stock one of the most comprehensive ranges of sailing equipment in the country. However situations beyond our control may occasionally result in an item(s) being temporarily unavailable.

Items discontinued by manufacturers or that are no longer available: we aim to remove from our website as quickly as possible, but remember, we are only human after all.
If we are unable to supply any item(s) within 7 days, you will be contacted by telephone or email to offer alternatives or cancel your order. Available to order items, marked to follow will be sent automatically when they become available. We do NOT make additional charges for this service.
In any case, we aim to deliver goods within a maximum time frame of no more than 10 days from receipt of order. If we are unable to do this, you will be contacted to make arrangements for any necessary refund to be issued.

We want you to be 100% satisfied with any online order placed with us. Therefore if you wish to return an item for whatever reason you may contact us by email at sales@vikingmarine.ie to organise a return.

All returns must be organised within 30 days of receiving your order. Refunds are available within the first 14 days after receiving your order. After this period we can offer an exchange or store credit.

Goods can be returned for a full refund plus any shipping paid at the time of purchase if they are faulty or if the wrong item has been dispatched.

Items must be unused and still have their original packaging and labelling attached.

Nothing in these conditions affects your statutory rights as a consumer.

The PayPal account or card used originally for the purchase will be credited with the original purchase amount

If you are looking to exchange the goods for an alternative product or size, you will be liable for the extra shipping costs from our end.

Any footwear returned to us must be in its original condition, including boxes and footbeds.

Any items that we deem unhygienic will not be processed so please clean faulty goods if returning them.

Please note that if items are returned you should ask for proof of postage from your post office as we reserve the right to refuse a refund if an item is lost whilst being returned. Any item bought online can also be returned in store within the terms and conditions of sale, just remember to bring along your receipt.

Special Orders
If you have changed your mind on a non regular stock item that was ordered specially this can be returned for store credit only.

Returns Address

Viking Marine,
The Pavilion,
Marine Road,
Dun Laoghaire,
Co. Dublin,
Republic of Ireland.

Phone: +00 353 (1) 2806654
Email: sales@vikingmarine.ie

Optimist Daggerboard Polyester

EX11100

€219.95

Tax included. Shipping calculated at checkout.

Optimist school foils from Optiparts. Optimist GRP Polyester daggerboard. The Optimist daggerboard is fitted with durable teak battens. For Optimist training and school use only.