Manufacturer part #: 3123
   Technical Description
Mastbase Block/Fixed
4 in
102 mm
1 5/8 in
41 mm
5 1/8 in
130 mm
5 1/8 in
130 mm
1 1/16 in
18 mm 
24.9 oz
708 g
11000 lb
4990 kg
22000 lb
9980 kg
 Low-profile mastbase halyard lead blocks are lightweight and can be grouped in a small area at the mastbase. Flared cheeks prevent chafe on the halyards.
High-load bearing system has Teflon® composite bushing, sideload balls. Hardkote-anodized aluminum sheave for additional strength.
        
    High-load bearing system has Teflon® composite bushing, sideload balls. Hardkote-anodized aluminum sheave for additional strength.