Tail Case Set HS1077Instruction:Use for T-REX450X/XL Specification: Tail unit housing(R) x 1Tail unit housing(L) x 1Tail pulley assembly x 1Bearing(MR52ZZ) x 1(2x5x2.5mm)Collar screw x 1(M2x12)Self tapping screw x 3(M2x10)Self tapping screw x 2(M2x16)