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FAQs Shipping & Delivery Returns & Exchanges
FAQs Shipping & Delivery Returns & Exchanges

Allen Brothers 20MM Dynamic Single Multi Top

Note: Some prices may reflect updates due to international tariffs. Learn the latest about tariffs

Tariff Updates

We are observing how the tariffs are behaving. Lots of our products are imported from Europe and some of the manufacturers are not providing heads up about price increases. We will do everything in our power to hold the best prices, but please consider that in these uncertain times we may be forced to increase the prices without previous notification.

We really appreciate your understanding and look forward to working with you.

What does this mean for you?

  • Some imported products may show a higher price than usual.
  • Prices may change as shipping rates adjust globally.
  • We are committed to providing the best possible pricing and transparency at all times.

How we’re handling it:

  • We only adjust prices when absolutely necessary.
  • We continuously monitor shipping rates and update pricing accordingly.
  • We’ll clearly notify you if a product is affected by tariffs.

Questions? Feel free to contact our team for any clarification or assistance.

Updated: April 2025

MSRP: $13.47
$12.90
(You save $0.57 )
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SKU:
ALNA2021
Availability:
Please contact us to confirm availability or discuss item replacements. Please note that certain products may have an estimated arrival time of 30 days and are not available for expedited shipping.
Weight:
0.03 LBS
Shipping:
Calculated at Checkout.
Size:
20 mm

The multi function block has a slightly different strap compared to the A2020.

The A2021 multi function block is the base block used in the following variations: A2021F, A2021HK, A2021SC and all double and triple variations.

The multi function head is designed to attach our swivel, fork and cheek adaptors to. It is also used for riveting to the double and triple ultra-straps.

Bearings – Dynamic Blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. This provides a superior load-carrying ability and longevity when compared to other bearing systems which run on a plastic rail.

Becket – Our 20 & 30mm blocks offer a large central rivet which not only reduces the overall weight but also offers a rope friendly attachment, perfect as a tie-off point when being used in a cascade system.

Technical Description
1 3/8 in
35 mm
15/64 in
6 mm
771.61 lb
350 kg
253.53 lb
115 kg
0.40 oz
11.5 g