41 mm Black Tripod Quick Release Plates: Base Size: 41mm (1 5/8") x 41mm (1 5/8"). The tapered square base fits into opening mount of the tripod head measures 1 5/8” (41mm) across in both directions.Compatible with Ambico V-0550 V-0551 V-0552 V-0553 V-0554 Fluid Type Head Only (See Notes) Sunpak 7500 Pro 7500tm 7575, Kalimar Pro-Tech V-40, Samsonite 1100 2601, ONLY CERTAIN Quantaray tripods, Please check compatible tripod list in below detail description. | 43 mm Black Tripod Quick Release Plates: Base Size: 43mm (1 11/16") x 43mm (1 11/16"). The tapered square base fits into opening mount of the tripod head measures 1 3/4” (44mm) across in both directions.Compatible with certain models ofAmbico, Velbon, Ravelli, Sunpak, Tar gus, Davis & Sanford Vista Explorer 60”, Sony, Zomei, Opteka, Dynex, Polaroid, Vivitar and Takama tripods,Please check compatible tripod list in below detail description. | Tips: Our Tripod Quick Release Plates base size is standard as picture shown.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. | 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 oxidized, durable and strong. With standard 1/ 4 inch screw, and the screws on the quick release mount bottom could help you install faster.Plastic with a rubber top and features a metal pin and a high-quality metal thumb screw. | 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.No tools required to tighten the screw. High quality, sturdy and secure fit for your camera tripod mount.