GRB IP68 Sealed Rocker Switches CW Industries GRB IP68 Sealed Rocker Switches were designed for harsh environment applications. The non-illuminated GRB Series IP68 Sealed Rocker Switches from CW offer a 25A 12VDC rating and an operating temperature range from -25°C to +85°C. Other GRB specifications include black actuator color and gray housing color, maximum contact resistance of 20mΩ (initial), mechanical life >,100,000 cycles, and RoHS compliance.