ITEM NAME:School Factory Fire Alarm Safety Electric Bell 75mm AC 110V UC4-75 E1Y1 School Factory Fire Alarm Safety Electric Bell 75mm AC 110V UC4-75 E1Y1 Z2Q5 Product Name: Electric Bell; Color: Silver Tone, Black; Material: Metal, Plastic Net Weight: 266g; Model: UC4-75; Rated Voltage: AC 110V Bell Diameter: 75mm / 3"; Base Diameter: 90mm/ 3.54" Overall Height: 55mm/ 2.17"; Mounting Hole Dia: 5mm/0.2" Metal bell and plastic base,designed with 2 wire.Suitable for residential building, office, factory, schools, shops, hotel, factory, public places, etc. Package Content: 1 x Electric Bell Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.