2 Outside & 2 Inside Snap Ring (OSR/ISR) Style | Cap Diameter (in) 1.000 / 1.063 | Over Caps Length (in) 2.560 / 3.220 | Regular lube fitting in center of cross, U-Joint Core made of 20CR Alloy Steel features higher wear resistance, fatigue strength and steel hardness, Premium quality MolyPro™ NLGI Grade 2 Molybdenum Grease (MoS2) to minimize wear and reduce friction providing longer lasting performance, Exclusive multi-lip seals are made with ProSeal™ Nitrile Rubber (NBR) which can successfully function at high delta of temperatures while retaining its flexibility and sealing performance, Inner rings are made of Case-Hardened Steel for improved resistance to surface wear and contact fatigue, Thickness and metallurgy electronically validated for manufacturing consistency, SAE J1714, J2525 and J2535 validated for OEM load-carrying capacity, durability, and performance characteristics, Part Reference Numbers : 372 3-3130 UJ372 5-3022-1X