Explanatory notes
… 39.17 ‑ Tubes, pipes and hoses, and fittings therefor (for example, joints, elbows, flanges), of plastics. 3917.10 ‑ Artificial guts (sausage casings) of hardened … materials ‑ Tubes, pipes and hoses, rigid : 3917.21 ‑ ‑ Of polymers of ethylene 3917.22 ‑ ‑ Of polymers …