Premium Material: The camera mount adapter plates is made of premium PVC material. The middle anti-twist locking screw is made of aluminum material. The surface is finely oxidize, and strong. With standard 1/ 4 inch screw, and the screws on the quick release mount bottom could help you install faster. Compatibilty:Compatible with Sunpak 7500 Pro 7500tm 7575, Kalimar Pro-Tech V-40, Samsonite 1100 2601, (Note:This Tripod Quick Release Plate may be compatible with certain models of Quantaray and Ambico tripods, please check compatible tripod list in below detail description and measure your tripod head.) Easy to Install: According to the card position of the Pan/ Tilt/ Zoom, you could insert the mount quick release plates directly for installation. You could adjust the slotted screw with your fingers or tools. The quick release tripod mount adapter could be fixed to the camera base, facilitate the installation and disassembling of the tripod, save time and easy to use.With standard 1/ 4 inch screw, and the screws on the quick release mount bottom could help you install faster. Tips: NOT Universal, fits certain tripods only.Please make sure to read the model clearly before placing an order.Find your tripod brand and model on the tripod leg or head, check your compatible tripod models if in our list, if your tripod brand is not listed in our page, do not expect too much it to fit well. You must measure the size of the tripod opening head in both directions. Size details: Base Size is 1 5/8"(41 x 41mm square).The tapered square base that fits into the tripod base is 1-5/8" x 1-5/8" (41mm x 41mm) dimensions on the bottom (that fits inside the opening in the mount head of the tripod). Has 1/4 inch Camera Mounting Screw that fits most cameras and camcorders and cell phone tripod adapters.