Soynia Electronics manufactures Phenolic Made Small Booster Knob. Soynia Electronics is an ISO 9001:2000 certified company. The Company also manufactures toggle switches, micro and mini micro switches, illuminated rocker switches, plugs and sockets, connectors, fuse holders, terminal blocks, indicator lights, panel board accessories, etc. The Phenolic Made Small Booster Knob has brass bushing as insert material and brass made screw material. The Phenolic Made Small Booster Knob has hole diameter of 6.35 mm for shaft.