Schaefer Twin Sheet Block f/1-1/4" T-Track - Black [32-97] Hunting & Fishing | Rod Holder Accessories Additionally the ball bearings are

Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks

Soft close seat prevents annoying seat slamming and includes a unique feature that locks the seat in place while boat is rocking

Material - PU coated 840D nylon

Mounting Clamp Accessory specifically for Ultimate 747 and 757

Schaefer Twin Sheet Block f/1-1/4" T-Track - Black [32-97] Hunting & Fishing | Rod Holder Accessories Additionally the ball bearings areTwin Sheet Block for 1 1 4" T Track Black Hardcoat anodized aluminum body and slider provide a high strength block. Aluminum sheave runs on nomex Teflon bearing for a low friction, high strength sheave. Articulating sheave allows for a proper lead. Pin stop makes adjustment simple. Specifications: Track Size 1 1 4" x 3 16" (32 mm x 5 mm) Max. Boat Length 38' (11. 5m) Max. Boat Weight 18000 lbs. (8182kg) Max. Sail Area 715 sq. ft. (66 m2) Sheave