1. 4 ball bearing design 2. Stainless steel door hinge 3. Supplying size:5x4x2. ... 5, 5x3x3, 4x3x3, 4x4x2.5 inch Heavy Duty 4 Ball Bearing Stainless Steel Door Hinge Materialstainless steelFinishPolished brass, Antique brass, Antique ... to customers' requirementSize5x4x2.5, 5x3x3, 4x3x3, 4x4x2.5 inch Ball bearing pin materialSteel and stainless steel Pictures Similar Products Certification Our ...