20mm plastic mini valve POM material.good quality. many sizes and any color is available. 20mm plastic mini valve size:Φ20×Φ20 (1) there are 16*16. 16*1/2, 16*3/4.20*20, 20*1/2, 20*3/425*25, 25*1/2, 25*3/4and pipe valves.16*1/2,16*16.many sizes are available. (2)the color of switch can be blue,red.any color is available. (3)the material is the best plastic.POM. (4)the perfect performance and ...