Dodge Coupling Sleeve, Type JNS, Series: D-Flex, 08 Coupling, 2-1/2 in Length, 5-1/16 in Outside Dia, 1135 in-lb, 4500 rpm Maximum, For Use With: D-Flex Coupling, -30 to 275 deg F, Neoprene 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