... open water-proof UV sleeve and UV germicidal lamp We are a very professional manufactuer for uv lamp, uv ballast and UV sleeve in China ... .most of our uv lamps, uv ballasts and UV sleeve are used ... 317mm, 411mm, 533mm4)diameter of uv lamp: 12mm, 17mm5)Wavelenght of uv lamp: 253.7nm, 185nm6)Cap type of uv lamp: G23, 2G7, GX23, 2G11 ...