Ground Spur Gears (MSGA<B>) Ground Spur Gears (SSG) Ground Spur Pinion Shafts (SSGS) Steel.spur Gears (SS) Steel, Hubless Spur Gears (SSA) Steel, Thin Face Spur Gears (SSY) Steel, Hubless, Thin Face Spur Gears (SSAY) SSAY Stock Gears with K-Clamps Stainless, Steel, Spur Gears (SUS SUSA) Fairloc Hub Gears (SUSL) Plastic Spur Gears with Steel Core (NSU) Plastic Spur with Stainless Stainless Steel Core (PU) Plastic Spur Gears (PS PSA) Injection Molded Spur Gears (DS) Brass Spur Gears (BSS) Steel Ring Gears (Spur Gears) (SSR) Sintered Metal Spur Gears (LS) Fairloc Hub Acetai Spur Gears (DSL)