Stronger and stiffer assemblyUpgrades the stock 5x11x4mm unsealed outer pinion bearing with an oversized 5x13x4mm sealed bearing for a stiffer and stronger drive train.CNC machined aluminum construction.Anodized black.Fits both the front or rear.Direct fit hop-up requires no modification for use.Fits :Arrma Felony 6S BLXArrma Infraction 6S BLXArrma Infraction V2 6S BLXArrma Kraton 6S BLXArrma LimitlessArrma Notorious 6S BLXArrma Outcast 6S BLXArrma Senton 6S BLXArrma Talion 6S BLXArrma Typhon 6S BLX