The T6000 Series of industrial trackballs have a very small 2.5 inch square footprint design. These precision trackballs require less than 1.0 inch below panel depth for the quadrature model, and 1.54 inches for units with an interface PCB (Industrial Mouse® Trackball Mouse Pointer). The 1.3 inch diameter industrial trackballs can withstand over 100g forces. CTI's industrial trackballs mount to the panel with four screws and comes with a neoprene gasket; which combined with the formed Teflon sealing ring in the anodized aluminum housing is spill resistant. The unit is protected from below with a blue anodized aluminum cover that also includes a drain hole. These industrial trackballs and trackball mouse pointers combine all the high reliability features of CTI's trackballs, with an encoder resolution of either 832 or 416 per rotation, or divisions thereof.