Heigth: 11cm / 4.3inchﾃｯﾂｼﾂ娶idth: 8.5cm / 3.13inchﾃｯﾂｼﾂ姚enght:2.9cm / 1.143inch;Stainless steel sheaves for excellent durability.;Closed Strength: 6700lbs / 30KN ﾃｯﾂｼﾂ Maximum allowable speed: 35 m/s;The wheels have bearings, not just a metal shaftﾃｯﾂｼﾂﾃｯﾂｼﾂ;CE Certification: EN12278