HS Code Heading 3917

3917.10.10 Artificial guts (sausage casings) of cellulosic plastics materials 3917.10.60 Artificial guts (sausage casings) of collagen 3917.10.90 Artificial guts (sausage casings) of hardened protein, nesoi 3917.21.00 Tubes, pipes and hoses, rigid, of polymers of ethylene 3917.22.00 Tubes, pipes and hoses, rigid, of polymers of propylene 3917.23.00 Tubes, pipes and hoses, rigid, of polymers of vinyl chloride 3917.29.00 Tubes, pipes and hoses, rigid, of other plastics nesoi 3917.31.00 Flexible plastic tubes, pipes and hoses, having a minimum burst pressure of 27.6 MPa 3917.32.00 Tubes, pipes and hoses, of plastics, other than rigid, not reinforced or otherwise combined with other materials, without fittings 3917.33.00 Flexible plastic tubes, pipes and hoses, nesoi, with fittings, not reinforced or otherwise combined with other materials 3917.39.00 Flexible plastic tubes, pipes and hoses, nesoi 3917.40.00 Fittings of plastics, for plastic tubes, pipes and hoses, nesoi