Allen Brothers 40mm Dynamic Block with R Strap and High Load Sheave
Pickup available at 1830 East Interstate 30
Usually ready in 24 hours
Shipping and Delivery
Free shipping for orders of $98 or more (US Continental)
- Free shipping for orders of $750 or more (International)
- Add 3 business days to the standard shipping time for USPS deliveries.
- UPS and FedEx Ground usually take 2 to 5 business days for in-stock orders.
- UPS and FedEx deliver on Saturdays only for Friday overnight shipments, which may incur an extra
charge. - Orders that apply for free shipping will be delivered between 8 and 10 business days.
- International customers will be responsible for any applicable import duties,fees, or taxes.
- Oversized items like whisker poles, spinnaker poles, and tracks over 7 feet require freight shipping, with an estimated cost of $500 depending on the destination.These orders must be delivered to a
commercial address, such as a marina, yacht club, or boatyard where your sailboat is located.
A recipient must be present to sign for the delivery upon arrival,For more info, Click Here.
40mm High Load Single Block With Removable Ultra-Strap
Made from high-strength, lightweight glass-loaded nylon and featuring Allen??s dynamic bearing technology for a high-performance block suitable for keelboats and dinghies.
40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines.
Bearings ?? Dynamic blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. The ball bearings are caged for further friction reduction. These features provide a superior load-carrying ability and longevity when compared to other bearing systems.
Removable Ultra-Strap ?? Our patented Ultra-Strap is used in our 20, 30 & 40mm Dynamic blocks. The Ultra-Strap is unique when compared to other designs because of its coining process. This process strengthens the strap, making it more reliable and hard-wearing as well as making it rope-friendly. The Ultra-Strap block is a great choice for dinghy jib or mainsheet systems.
The strap is held in place with a bolt and nut. It can be easily removed to allow quick and easy fitting.
Becket ?? The 40mm range features a large central hole, which can be used as a becket (tying-off point).

