Dodge Coupling Sleeve, Type HS, Series: D-Flex, 012 Coupling, 4-11/16 in Length, 9-9/16 in Outside Dia, 31500 in-lb, 2800 rpm Maximum, For Use With: D-Flex Coupling, -30 to 275 deg F, Hytrel Rounded EPDM and neoprene element edges for full tooth engagement, even load distribution, reduced stress build up, and longer lifeOutside diameter concentric to bore for ease in alignmentInterchangeable components makes installation quick and easyNo lubrication assures trouble-free operation