Two Gang Flush GI Switch Box1, Easily Installation2, Size: 73*73*35mm3, Thickness: 0.6mm~1.2mm for Opting4, Depth: 16mm 25mm 35mm 47mm5, Fittings for ChooseOption 1, No FittingsOption 2, Iron Screw with WasherOption 3, Brass Terminal6, Package Information: Carton Size: 38*31*39cm 10PCS/Inner Tray, 200PCS/CTN7, Black Drawing will be more clearly for choosing knoct out size (20mm or 25mm two options)EVT Electrical Co., Ltd. Is the earliest and most professional manufacturer of Electrical Metallic Tubings and Fittings in Hangzhou of China. Our former is Hangzhou Xinye Mechanical Fittings Factory established in 1985. With more than 25 years of experience, EVT Electrical Co., Ltd. Has established the stable business relationships with customers all over the world.