25mm pliable conduit that can be preformed by hand and will retain its shape around the contours of uneven surfaces. id 20.4mm od 27mm supplied in 30M coils. Colour black. Construction Smooth inner bore of Kraft paper with metallic spiral of leaded steel support, PVC oversheath. Temperature rating -20 to +70 C. Protection rating IP67. Flammability Self extinguishing with 10 second flame resistance. resistance definition Class 3 medium 940 newtons. Mechanical tensile strength Class 3 medium 550 newtons.. 30m in length.