Chinatera QR Plate for Video Tripod Head 717 EI-717A 717AH Quick Release Weifeng Adopting CNC machining material,surface treatment,make more delicate than the original Suitable for WF-717,EI-717,WF-717A /727 /737 Tripod Head Screw configuration 1/4 to 3/8, no matter the camera hole is big or small, all can be used Material:CNC Size:8*6*1cm