Sirui: VH15, VH10, VH-20, BCH-20, V125. Reserved 20PCS UNC1/4 screw threads for function extensions. Manfrotto: MVA500AH, MVA500A, 500AH, 501HDV, 502AH, 503HDV, 504HD, 509HD, 701HDV, 577, MH054M0-Q5, MH055M0-Q5, MH055M8-Q5, MH057M0-Q5, 561BHDV.
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