Shepherd 9194 2" Threaded Stem Caster Soft rubber wheels give mobility to heavy loads on smooth hard surface and finished concrete floors where quiet movement and floor protection are major considerations 9194 Stem: 1-1/2"H, 3/8" Diam, and 16 TPI 9196 Stem: 1-1/2"H, 1/2" Dia, and 13 TPI