1.20,25,32,40,50mm plastic check valve/one-way valve/non-return valve 2.material:PPO 3.HDT:120c ... factory has 20,25,32,40,50mm plastic check valve/one-way valve/non-return valve with germany standard,PPO material,heat ... .minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); plastic check valve/plastic one-way valve/non-return valve