MobilePick Generic Qb-4w Quick Release Plate Replacement Accessory for Cx-460mini VCT-D580RM/ VCT-D680RM/ VCT-R640/ Velbon CX-888/CX-444/CX-460 Suitable for Velbon CX-444, CX-888, CX-460, CX-460mini, CX-470, CX-570, CX-690, DF-50 SONY VCT-D580RM, VCT-D680RM, VCT-R640 Replacement quick release platform, ideal as a spare For ease of changing cameras on your tripod Bottom Size: 44mm(1.73 1/4 inch tripod socket