Check the listing for details. Arrma Infraction 6s 5mm Diff Input Shaft Cup Set 4140 Tool Steel. Color: Silver, Condition: New. Listed at 20.99 USD. Arrma Infraction 6s 5mm Diff Input Cup Set 4140 Tool Steel Machined from robust 4140 tool steel, these drive cups offer a significant upgrade over their standard counterparts. Our drive cups are designed to minimize wobble and significantly reduce the risk of the cup working itself free. These cups are a significant upgrade over the stock ones, which are notorious for being drilled off-center. Replacement for: ARA310977, ARAC5062, ARA311144 Weight: 21.1 grams per setPackage Includes:2x Drive Cups4x Grub ScrewsSpecifications:Outer Diameter: 13mmInner Diameter (dog bone): 8mmInner Diameter (shaft): 5mmLength: 18mmGrub Screw: M5x.1Installation Tips:Thoroughly degrease the parts.Apply Loctite #262 or #271 to the set screws.Use Loctite #262 or #271 on the cup/shaft joint.Allow 24 hours for optimal bonding.Incorporate O-rings in the drive cups to eliminate bone play.Why Choose RamJam Racing?Unbeatable Pricing - Delivering superior parts at unbeatable pricesPrecision - Using state of the art manufacturing techniques allows us to hold precise tolerancesManufacturer Defect Warranty - All parts include a manufacturer defect warrantyFull customer support - Send us a message! Due to the nature of the RC hobby and the stresses and high loads pushed through these parts, there is NO WARRANTY for users error.