Long LiPo Cup. - For use with the taller 25mm height LiPo batteries only. Works with JRXT and JRXPro Graphite Chassis. Two brackets are attached to the rear shock tower to hold the LiPo. May work with JRX2 chassis but has not been tested. JRX2 chassis is slightly shorter in length. Will not work with LXT - JRXPRO SE - Junior -Junior T molded chassis.