Viadana Single Ball Bearing Strengthened Block 57mm.

Sheave size - 57mm / 2 1/4"
Max line size - 12mm / 7/16"
Overall Height -123mm / 4 7/8"
Weight - 172 grams / 6.07 ounces
Breaking Load 1450 kg / 3,196 lbs
Max. Working Load - 580 kg / 1278 lbs
Head is adjustable and can be either stationary or swivel