Made to original specifications for rebuilding existing guns or assembling new guns built to factory Government or Commander configurations. Heat-treated, recoil spring guide resists wear and battering. Mfg: Ed Brown SPECS: Govt: Plug/Guide Steel, blue matte finish. Plug - 1½" (4cm) long, ½" (13mm) O.D. Guide - 1-5/8" (4.1cm) long. Commander: ½" O.D. Guide - Steel, matte blue finish. 1-3/16" (3cm) long.