This tiny and unique block pivots on one #8 screw, and has a 5/8" sheave.

16m Blocks have a lightweight design and a unique patented bearing system which uses stainless steel balls in a captive, grooved race. Very high working loads in an extremely lightweight block, with the best strength-to-weight ratios around. 

• Requires #8 fastener (sold separately)
• Very high working loads in an extremely lightweight block
• Lightweight design and a unique patented bearing system
• Stainless steel ball bearings
• Polished 316 stainless steel top strap
• Sheave Diameter: 5/8" (16 mm)
• Max. Line Diameter: 7/32" (5 mm)
• Max. Working Load (MWL): 250 lb. (113 kg)
• Breaking Load: 750 lb. (359 kg)
• Weight: .38 oz. (11 g)
• Length: 1 3/8" (35 mm)

16mm Cheek Pivot Block