Haoge 300mm Rapid Connect Long Sliding Quick Release Plate for Manfrotto MVA500AH MVA500A 500AH 501HDV 502AH 503HDV 504HD 509HD 701HDV 577 MH054M0-Q5 MH055M0-Q5 MH055M8-Q5 Tripod Fluid Video Head The Haoge HQR-MS300 long version quick release sliding plate is a Manfrotto-type compatible multi-purpose rail with a laser-engraved reference scale with 1mm increments on both sides Compatible with Manfrotto: MVA500AH, MVA500A, 500AH, 501HDV, 502AH, 503HDV, 504HD, 509HD, 701HDV, 577, MH054M0-Q5, MH055M0-Q5, MH055M8-Q5 Compatible with Benro: KH-25, KH-26, S2, S4, S6, S8 Compatible with Sirui: VH15, VH10, VH-20, BCH-20, V125