Check the listing for details. FRONT/REAR DIFF OUTDRIVE CUPS. Condition: New. Listed at 25.99 USD. Packaging Includes: Outdrive cup-2pcs Original Name / Part No: 7754X Part Location: Connecting The Axle Case & Front & Rear CVD Does this product replace a specific part or function? Yes Product major function & usage: The Body Of The CVD Is Designed 1.5mm Thick, The Shaft Pin Is Produced 0.5mm Thicker Major advantages of upgrading to this product: (1) Made of medium carbon steel, hardening black treatment, the cup is reinforced to prevent cracking effectively and is more durable (2) Compare With Original Joint, The Outer Diameter Was Upgraded From 17mm To 18mm To Increase Rear Power Transfer. End user point of view key selling points GREATLY INCREASE THE STABILITY OF THE XMAXX AND GENERATE THE BEST POWER FROM THE MOTOR TO THE CAR Suitable Model: TRAXXAS-1/5 ELECTRIC 4WD X-MAXX 8S MONSTER TRUCK TRAXXAS-1/6 4WD XRT 8S-78086-4