'Sure-Flex Plus, 6 Size - Sleeve Couplings, Flange Type - Sleeve Couplings H, Insert Design - Couplings One-Piece Solid, Material - Inserts Hytrel, Rated Torque 1800 in.-lb., Max. RPM 6000, HP Rating @ 100 RPM 2.90, Outside Dia. 3.75 In., Width 1.88 In., -65 Degrees to 250 Degrees F, Motors, Pumps, Compressors, Blowers, Mixers and Conveyors'