... " check valve ,refrigerator check valve,1/4" brass check valve 1/4" refrigerator brass check valve,1/4" check valve ,refrigerator check valve ... 2 Length :50mm ,70mm ,90mm ,100mm, 120mm,130mm 3 Size:1/4 ,1/16,3/8 4 Material :Brass ,Red copperAbout products ... . All products confirm strictly with ANSI/ASME B16.22 or EN 1254-1/BS864-2.5. Three- step Quality control. Inspect the ...