size : 87.5×91.5 mm characteristic Our metal keypad used in ATM and other top grade kiosk is specialized in its waterproof ,abrasion-proof and vandal proof design. It is able to well cooperate with the opeators with a good touch feeling. Its front panel and back are both processed with our advanced technics. parameter material: 304 stainless steel lettering: raised key with high density printing ink life expedence: one million times per key operating perssure: 250g stroke travel 0.45mm operating temperature 0°C to + 45 °C storage temperature -30 °C to + 70 °C Currency: USD