fresh and effective Features: Scope of application: control of pneumatic switches for merchandise comparable to garbage processor, rub down bathtub, children's toys and so on. Main material: ABS engineering plastics stainless steel silicone gasket Product surface: vivid chrome plating Installation hole: 28mm, 32mm, 34mm Dimensions: 38x64mm/1, 46x64mm/1, 46x64mm/1 Color: White, Black Quantity: 1 Pc Note: 1 allow 0-1cm error because of guide measurement. pls make sure you do not intellect before you bid. 2 to the variation between diversified monitors, the picture might not replicate the particular shade of the item. Thank you! Package includes: 1 x Air Pressure Switch (without retail package)