Usage Tips:1Cap Handling: This capping head works with electric cap sealing machine, can easily tighten, loosen or rotate various nut caps, saves effort, improves efficiency. 2For 20mm to 30mm: The capping head is specially designed for caps with a diameter of 20 to 30mm, very functional and practical. 3Precise Size: The capping head is precise manufacturing processed, with accurate shank size, can connect to the machine perfectly. 4Easy to Operate: This capping head is easy to install and operate, suitable for most high strength bottle caps. 5Premium Materials: The capping head is made of premium metal material, strong and sturdy, not easy to break or damage. Item Type: Electric Cap Sealing Machine Head Material: Metal, rubber Cover Diameter: Approx. 20-30mm/0.8-1.2in Bottle Height: Unlimited Rubber Pad Outer Diameter: Approx. 40mm/1.6in Rubber Pad Height: Approx. 17mm/0.7in 1 x Electric Cap Sealing Machine Head Use directly after confirming the size.