Specifications 1) Steel ball bearing hinge. 4bb 2) Size: 4" x 3" x 2mm, 4 ... 5mm, 4" x 3" x 3mm, 5" x 3"x2.5 Specifications1) Steel ball bearing hinge. 4bb2) Size: 4" x 3" x ... 2mm, 4" x 3" x 2.5mm, 4" x 3" x 3mm, 5" ... x 3"x2.5, 5" x 3" x 3, 5" x 3.5" x 2.5, 5" x 3.5" x 3, 5" x 4" ... packing 100prs/ctn, or as per customers' requirement. Steel Door Hinge----best quality