The C-type tabletop heat sealers are very easy to operate and require minimal working space. Additional Details ------------------------------ Product description: C-type replacement blades - 6 pcs. / set The integrated cutting knife is designed to cut any flexible packaging film which can be sealed on the C-type sealing machine. It has a double side cut in order to be able to cut the film from both directions. The cutting knife can be easily changed without disassembling the machine (see instruction manual). The knifes are safely stored in a unit of 6 pcs. Attention! The cutting knife is extremely sharp! Follow always the instruction manual for changing the part. After changing the part it is a MUST to check the proper function of the safety cutting knife system!!!