2 products in this product line Rubber Raft valve 830-AOV RD proInfo Crimped onto flange. Unit construction reduces leak paths and increases stability. Urethane flange welds to most urethane coated inflation chambers. Materials : - Stem : brass. - Flange : polyether based urethane(Neoprene rubber), good chemical stability, and maintains flexibility over a wide temperature range. - Cap nut : Plastic. - High quality valve core. 830-AOC RD proInfo Crimped onto flange. Unit construction reduces leak paths and increases stability. Urethane flange welds to most urethane coated inflation chambers. Materials : - Stem : brass. - Flange : polyether based urethane(Neoprene rubber), good chemical stability, and maintains flexibility over a wide temperature range. - Cap nut : brass. - High quality valve core.