"The item measures 3.13 inches in length, made of CRES rod 304 (0.187 diameter) that meets QQ-S-763 standards, Condition A. It has a passivated finish according to MIL-STD-171, specification number 5.4.1. This part is a component of the Electro-Optical Target Designator Set and is used on the AN/AVQ 26."