Allen 20mm High Load Back to Back Block Select (See Table Below):AL-2028-HL 20MM HL DYNAMIC: BACK TO BACK - EACH cut it off and make

cut it off and make another loop

The twin nitrile diaphragms ensure that the pump continues working if one is damaged

Suitable for outboards up to 15HP - see below

clever design

Soft annealed red copper / steel tubing 8mm ID / 10mm OD

Allen 20mm High Load Back to Back Block Select (See Table Below):AL-2028-HL 20MM HL DYNAMIC: BACK TO BACK - EACH cut it off and make20mm High load back to back block. The Allen 20mm dynamic ball bearing block is simply the best designed and engineered micro block on the market. Featuring Allen's high load stainless steel sheave & dynamic bearing system to withstand extreme loads. Allen High Load Blocks fit between the standard dynamic range and the XHL range featuring a stainless steel sheave which runs on a double race of stainless steel ball bearings. By utilising a stainless