22mm Fiddle Micro Block with V-Jam & BecketLow-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes.. Specifications:. Sheave: 22mm / 7/8in.. Length: 102mm / 4in.. Weight: 57g / 2oz.. Shackle pin: 5mm / 3/16in.. Maximum line: 6mm / 1/4in.. Maximum working load: 159kg / 350lb. Breaking load: 544kg/ 1200 lb