20 pcs Power Jack DC Socket: 10pcs 5.5X2.1mm & 10pcs 18 x 14mm, Material: metal & Metal, Plastic Product Name: Power Jack DC Socket; Model: DC-022A Type: 2.1x5.5mm Socket Rated voltage: 24v Rated current: 3A Size: 18 x 14mm/0.7 inch x 0.55 inch & 5.5 x 2.1 mm / 0.22 x 0.08 inch (L x D) Mount Hole Diameter: 12mm/0.47 inch Color: As shown Material: metal & Metal, Plastic Package Content: 20 x Power Jack DC Socket and high quality DC socket is best for: 1 audio and video products: MP3, MP4, DVD. audio; 2 digital products: digital cameras, digital cameras, etc; 3 remote control: Volume vehicles, doors, home security products for the remote control; 4 communication products: mobile phone, car phone, telephone, building equipment, PDA etc; 5 household appliances: TV sets, microwave ovens, electric rice cooker, electric wind, electronic human body scale,Electronic fat scale, electronic kitchen scale, etc; 6 security products: visual intercom, monitor, etc; 7 toys: electronic toys, etc; 8 computer products: camera, recording pen, etc; 9 fitness equipment: running machine, massage chair, etc; 10 equipment: blood pressure gauge, thermometer, hospital call system, etc.