... :0.7mm PK:Roll/Pancake Specifications:Single wall bundy tube for condenser Outer diameter: 4.0mm-10.0mm. Wall thickness: 0.5mm-1 ... .0mm.Single wall bundy tube for Condenser . Widely used in freezer ... ;2)main use:widely used in refrigeration,freezer etc;3)outer diameter:4.00mm,4.76mm,6.00mm,6.35mm,8.00mm ...