Features: 1.Long lifespan, durability over 10,000,000 times 2.Suitable for shopping malls, multi-function game console, Pot-O-Golds, 8-Liners, VGA Game console 3.Simple structure is good for assembling 4.Compatible model:Raspberry Pi 1/2/3/3B Retropie Arcade DIY Projects, MAME DIY Projects, USB MAME Cabinet Arcade DIY Projects, Mini Arcade Machines, Family Professional Classic Video Game Console, Fighting Stick Super Street Fighter Joystick, Mini Table T 5.This start buttons feature high sensitivity and easy to control specification: Long lifespan, durability over 10,000,000 times. Suitable for shopping malls, multi-function game console, Pot-O-Golds, 8-Liners, VGA Game console. Compatible model:Raspberry Pi 1/2/3/3B Retropie Arcade DIY Projects, MAME DIY Projects, USB MAME Cabinet Arcade DIY Projects, Mini Arcade Machines, Family Professional Classic Video Game Console, Fighting Stick Super Street Fighter Joystick, Mini Table Top Arcade Machine & PC Controller Computer Game etc. This start buttons feature high sensitivity and easy to control. Simple structure is good for assembling. s: Material: plastic, metal Color: as the picture Product size: diameter: 28mm/1.10inch, length: 64mm/1.10inch Installation size: 28mm/1.10inch Key diameter: 35mm/1.38inch (There is no positive or negative of micro switch) Operation method: knob type Operating pressure: 1.25-1.5N Package Included: 1 x "ONE Player" button 1 x "TWO Player" button 2 x adapter rings 2 x high quality micro switch