SF Mixing Arm HS1072Instruction:Use high precise SF mixing arm with dual bearingsUse for T-REX450X/XL Specification:Flybar seesaw holder x 1SF Mixing arm x 2Bearing MR52ZZ x 6(£X2x£X5x2.5mm)Collar screw x 2(M2x7)Collar screw x 2(M2x8)Holder collar x 2Linkage ball x 4Cross screw x 4(M2x6.5)Washer x 4(£X2x£X3.8x0.2mm)Washer x 2(£X2x£X3.8x0.5mm)