The 64E9 is a round lens set designed for 16mm Command Series pilot light indicators manufactured by TE Connectivity/Alcoswitch. It includes a button, diffuser, and cap assembly that snaps into place on both oiltight and non-oiltight indicator housings. The lens set is compatible with T1-3/4 midget flange-based lamps installed from the front panel, and operates within a temperature range of 4°F to +122°F (-20°C to +50°C). The product meets UL File No. E-51302 and CSA LR-20479 standards, with an insulation resistance of 100 Megohms minimum and dielectric strength of 1,500 VAC. This lens set is ideal for applications requiring visual status indication in industrial control panels and instrumentation systems.