Description: 29 pcs Upgrade accessory set includes front and rear arm, front steering cup, rear wheel cup, C hub carrier, linkage, 28T steering arm, front and rear shock absorber, steering kits, 12mm hub hex, and steering mount. All pieces made of strong metal, solid and durable. Improve performance, easy to install and use. strengthen the rigidity of the body to prevent deformation of the body. Fit for WLtoys 144001 144002 1:14 rc car & for WLtoys 124017 124019 1/12 RC cars. Specification: Material:Metal Size Chart: front steering cup size: 32x25x18mm/1.26x0.98x0.71inch Front Arm Size:62x32x7mm/2.44x1.26x0.28inch steering mount size:16.5x13x5mm/0.65x0.51x0.20inch Rear arms size:68x34x7mm/2.68x1.34x0.28inch Steering Arm:20.5x8mm/0.81x0.31inch rear wheel cup size:31x16x22mm/1.22x0.63x0.87inch C Hub Carrier size:30x18.5x17mm/1.18x0.73x0.67inch Shock Absorber length: 82mm/3.23inch Stroke: 17mm/0.67inch Linkage: 58-68mm, Hole to Hole:55-65mm, 48-58mm Hole to Hole:45-55mm Steering Pull Rod: 42-52mm Hole to Hole: 40-50mm Package Includes: 2x Front Arms 2x Rear Arms 2x Front Steering Cup 2x Rear Wheel Cup 2x C Hub Carrier 7x Linkages 1x 28T Steering Arm 4x Front Rear Shock Absorber 1x Steering Kits 4x 12mm Hub Adapter 2x Steering Mount. Note: Please allow slight dimension difference due to different manual measurement.