1. Applicable model: NGERH1371FCZ1 Developer roller gear for Sharp MX 350 450 3511 4511 3512 4512 NU Developer gear 2. Features: the company produces its own products, comparable to the original packaging. 3. Accessories: 2 pcs with skeleton 4. Origin: hebei, China 5. Return and replacement: if the buyer is dissatisfied with the goods received and intends to return or replace the goods, please inform us within 3 days after the buyer receives the goods. If it is the problem of our products, we will bear the round-trip freight.