Feature:1. 360 degree rotation shaft designed, smooth and unobstructed, suitable for revolving doors.2. Thick stainless steel, high hardness, wear resistant, anti-corrosion.3. Fine brushed surface, good texture, enhanced corrosion resistance.4. Countersunk screw holes are designed to be more secure and durable.5. Hand polished, fine surface, not hurting the hand.Specification:Item Type: Rotating HingeMaterial: Stainless Steel Size:Neutral Shaft:Top: Approx. 100 x 24 x 20mm / 3.9 x 0.9 x 0.8inBottom: Approx. 100 x 24 x 16mm / 3.9 x 0.9 x 0.6inBall: Approx. 10mm / 0.4inEccentric Shaft:Top: Approx. 100 x 24 x 20mm / 3.9 x 0.9 x 0.8inBottom: Approx. 100 x 24 x 16mm / 3.9 x 0.9 x 0.6inBall: Approx. 10mm / 0.4in.Package List:2 x Hinge Top2 x Hinge Bottom2 x Rolling BallNote:Please allow 2MM error due to manual measurement. Thanks for your understanding.