Allen 30mm Back to Back Blocks Select (See Table Below):AL-2038 30MM DYNAMIC: BACK TO BACK - EACH Ideal for outboards and surfacing

Ideal for outboards and surfacing propellers

Manufacturer Part Number: 1225-BSS

Manufacturer Part Number: 09-1052S-9

This is a result of its unique trimaran FC hull shape designed with removable lateral stabilizers

Allen 30mm Back to Back Blocks Select (See Table Below):AL-2038 30MM DYNAMIC: BACK TO BACK - EACH Ideal for outboards and surfacing30mm Back to back blocks. With the Allen dynamic ball bearing technology at the heart of this block, the line friendly soft contours allowing articulation and stainless steel cheeks, the 30mm dynamic block will easily handle maximum loads and give unrivalled performance. Line friendly soft contours and articulation, Stainless steel cheeks and inner bearing systems handle maximum loads, Central hole for tie on becket. Spec Sheet Part Description Length