This product is for camera tripod: <br> -For Velbon CX-444, CX-888, CX-460, CX-460mini, CX-470, CX-570, CX-690, DF-50 <br> -For SONY VCT-D580RM, VCT-D680RM, VCT-R640 <br> <br> Extra QR plates allow you to conveniently swap out more than one camera with the same tripod. <br> Introduction: QR plates attach to the tripod mount on your camera and allow you to quickly and easily attach and detach your camera from a compatible tripod head. Bottom Size: 43mm(1.7") x 43mm(1.7")The package includes:2pcs Quick Release Plate . <br> <br> <b> NOTE: If your tripod is not in the list, please check the size of the quick release plate before your purchase.