Feature 1 APPLICABLE SIZE: The waterproof and leakproof interface of the special rubber pad is tight, the diameter of the lid is 3040mm, and the height of the bottle is not restricted 2 WIDELY USED: Suitable for all kinds of plastic bottles, glass bottles, laboratory test tube bottles, centrifuge bottles, medicine bottles and other round bottle caps can be used 3 STRONG AND VERSATILE: The product is made of excellent metal and rubber materials, suitable for a variety of sizes of bottle caps, possess good heat resistance, high mechanical strength and not easy to age 4 EASY AND PORTABLE: Easy to carry and operate, can be easily used to tighten, loosen or rotate various screw caps 5 NON DESTRUCTIVE OR WEAR: With adjustable clutch, can effectively avoid cap damage, reduce the wear inside the plugItem Type: Handheld Electric Cap Sealing Machine HeadMaterial: Metal and rubberCap Diameter: Approx. 30 ~ 40mm / 1.18 ~ 1.57inBottle Height: UnlimitedRubber Pad Outer Diameter: Approx. 60mm / 2.36inRubber Pad Height: Approx. 17mm / 0.67inWidely Used: Suitable for all kinds of plastic bottles, glass bottles, laboratory test tube bottles, centrifuge bottles, medicine bottles and other round bottle caps can be used Package List1 x Handheld Electric Cap Sealing Machine HeadNoteThis product must be used together with automatic bottle cap machine(cannot be used alone).