... thrust ball bearing 51416 1.high quality,best service 2.ISO9001:2000standard 3.best ... miniature bearings, non-standard special bearings, etc. Pulley type: window and door pulleys, shower pulleys, etc. Quality single row thrust ... 68mmWeight7.12KGFeatureSmooth,Good quality, long life, resistance to wear, dependable performance, high precision, clearance as requestedQuality Standard ISO9001: 2000 ...