Allen Brothers Dynamic Blocks A20

Allen Brothers Dynamic Blocks A20

$48.95 - $51.95

- Product details

Model: A2020*1 & A2030*1 & A2060Color: Black

Allen Dynamic Blocks feature our patented Dynamic bearing technology, which comprises of high quality stainless steel ball bearings running on stainless steel rails provide unsurpassed performance under load.  They can be used in a variety of applications from jib sheet to mainsheet systems and everything in-between.  

Block (mm) Length (mm) Max. Line Diamter (mm) Shackle Pin (mm) Breaking Load (kg) Max. Working Load (kg) Weight (g)
20 37 6 - 540 115 11.1
30 50 8 - 750 140 26
40 64 10 - 800 180 36.4
50 95 10 4 900 300 73
60 118 10 5 1000 500 126



+ Delivery & returns

Standard Shipping

$6.95 or FREE when you spend $99.

  • Delivered in approx 3-5 business days.
  • Orders dispatched direct from our warehouses in California and Michigan, backed up by our UK warehouse.
  • Delivery in partnership with USPS and FedEx.

Orders placed on Saturday, Sunday and Bank Holidays are usually dispatched the next business day. Adverse weather conditions may cause unforeseen delays. Tracking may not be available on selected orders.

International Delivery
Find your destination country on a list of countries we ship to for details on pricing and approximate delivery times.

Returns & Warranty

Extended Christmas Returns

Orders placed from the 25th October to 15th November 2023 are eligible for our extended 90 day return policy.

We offer a 60 day, easy return policy for unwanted items. We ask that all items are returned to us in a clean, unused and resalable condition, in the original outer and product packaging.

On the rare occasion you have experienced an issue with the items received, or you have not received your order within 3 weeks of receiving your dispatch confirmation please do†contact our dedicated customer service team†and we will be happy to assist you.

Every product sold on comes with a 12-month manufacturer warranty unless otherwise stated.

For more details or to generate a return, visit our returns page.

American Express
Bank Transfer

+ More info

Customers Who Bought This Item Also Bought

Recently Viewed Products


Your browser is extremely out of date. We strongly recommend that you try a different browser for the best experience when using our website. Close.