HC-ERK-SD, Emitter rebuild kit, standard. Includes one (1) Feeler Gauge 0.015″, one (1) Feeler gauge 0.050″, one (1) Align Tool for Filament, one (1) Filament 700 W, two (2) H.V. Ceramic Insulator, four (4) Collar Ceramic Insulators, one (1) Cross Ceramic Insulator.