The Manual Crimper Hand Sealing Machine is used for crimping 20mm Aluminum Plastic flip off caps Frosted material anti-slip Handle,not easy to fall when sweating on your hand Tightness of the cap can be adjusted by rotating the rolling head Perfect in workmanship,Good sealing effect Easy to operate,Safe and reliable.Diameter of the cap: 20 mm, Weight: 1.116200432506 pounds, Manufacturer: Biomed Scientific