It is an industry‑standard Size 14 (1.44"diameter), servo or face‑mount unit with a rugged, metal housing. The Series E14 includes precision bearings, an O‑ring seal, and a choice of 1/4"or 1/8" diameter stainless steel shaft. Series E14 incorporates the latest in microelectronic packaging, LED light sources, and matched sensors. Outputs are designed to be compatible with most 5V TTL circuits with options for higher voltage 12 and 15 VDC.