Medium wall: good abrasion, kinking and cut protection. 4:1 covers a wide range of applications, high contact pressure. Resistant to solvents, acids and alkalis. Halogen-free. MU47 is a medium wall 4:1 shrink tubing and is characterized by particularly good mechanical strength. It is resistant to solvents, acids and alkalis. MU47 offers protection for cables and lines against higher mechanical stress. The MA47 version is coated with a thermoplastic inner adhesive that reliably seals against moisture after melting.