... internet kiosks,industrial control platform,medical device,etc. *stainless steel trackball IP65 NEMA 4X Metal 38mm Trackball; *Dustproof, ... PS/2,USB; *Actuator/keys materials: 316#(RoHS) stainless steel; *Switch life: more than 2 million of operations; *Key ... .50mm; *Faceplate dimensions:83X110 mm; *High quality 316#(RoHS) stainless steel; *Lifespan: > 5 years; *Actuation Force: 1N; *Contact Material: ...