Available in bore sizes 2'' and larger, the T4 thruster features a black anodized body and precision re-circulating ball bearings, and provides smooth actuation. At the same time, four guide shafts - instead of the typical two of the earlier models - double the load-carrying capacity and reduce deflection. The T4 Thruster is available in 2'', 2.5'' and 3'' bores and comes in standard stroke lengths of 1'' to 12'' increments. Optional features include air cushions, bumpers, and magnetic position sensing.