... tube, the main material is POM, with excellent self lubrication nature ... nature of Pom(Polyacetal ) TubePOM The unique place is its toughness and hardness close to metal, high ... , gears, handles, toys, screw endorsed The general standard size of Pom(Polyacetal ) Tube ITEM NO.SIZEI.D ... 100M1012100TU1412-100M1214100This tube is called pom tube, the main material for the tube is pom, it is a special plastic ...