SPECIFICATIONS
Type: Round Belt
Material: zinc alloy
Function: single and double fixed pulleys
36mm Single crown block Size:
Total Height: 36mm, Wheel Groove Width: 5mm, Pulley Diameter: 13mm, Weight: 14 g, Large Support Weight: 100kg
36mm Double crown block Size: 
Total Height: 36mm, Wheel Groove Width: 5mm, Pulley Diameter: 13mm, Weight: 22 g, Large Support Weight: 100kg
52mm Single crown block Size:
Total Height: 52mm, Wheel Groove Width: 8mm, Pulley Diameter: 25mm, Weight: 40 g, Large Support Weight: 180kg
52mm Double crown block Size:
Total Height: 52mm, Wheel Groove Width: 8mm, Pulley Diameter: 25mm, Weight: 65g, Large Support Weight: 180kg
75mm Single crown block Size:
Total Height: 75mm, Wheel Groove Width: 10mm, Pulley Diameter: mm, Weight: 80g, Large Support Weight: 250kg
75mm Double crown block Size:
Total Height: 75mm, Wheel Groove Width: 10mm, Pulley Diameter: 35mm, Weight: 115 g, Large Support Weight: 250kg