The registration is the best solution for you. It’s free and gives many advantages.
Polyethylene sheath 12 mm thickness, 2 m length, for corrugated pipe insulation HTPE PLUS 63 (internal tube Ø 63mm, external tube Ø 75mm) and HTPE PLUS 76 (internal tube Ø 76mm, external tube Ø 90mm).
Price of 2 mt unit.