RY501 Rapid Connect Sliding Quick Release Plate 501PL With 1/4"-20 & 3/8" Screws For Manfrotto 501HDV 503HDV 701HDV MH055M0-Q5 1 x Sliding Quick Release Plate CNC Machined,Black Anodized,made of Aircraft Aluminium Weight:90g; Length:3.38"; Height: 0.43"; Depth:1.5"; RY501 Quick Release Plate is compatible with Manfrotto 701HDV 501HDV 503HDV MH055M0-Q5; Replaces old part #3433PL and heads that use RC5 quick release system It comes supplied with one 1/4"-20 and one 3/8" camera screw each, and features a location (video) pin