Material Made of high-metal and hard black plastic, more wear-resistant and durable. Compatible with: Go Kart ATV UTV Chinese 110cc 125cc 140cc 150cc engines Size: 12″ steering wheel assembly 17″ gear rack pinion u joint tie rod knuckle assembly . Overall Diameter : 11.81″ Center Hole : 0.71″ Rack : 15.4″ Adjustable Shaft : 17.1″ Content: 1* steering wheel 1* steering rack 1* pair tie rod 1* adjustable shaft 1* Other Accessories Warranty: For any reason, if you are not satisfied with your purchase, contact us directly. We offer a one-year warranty, 100% satisfaction guarantee. Compatible with:Go Kart ATV UTV Chinese 110cc 125cc 140cc 150cc engines Note:1.We provide clear pictures measurements where possible. Please check as much as possible to make sure the item is the one that you need.2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)3.There are no instructions included in this kit. Professional Installation Is Highly Recommended 4.Please check your machine in the list Before Purchasing!