This product is a 2Sets DRUM DEVELOPER UNIT GEAR Kit designed for Ricoh MPC3003, C3503, C4503, C5503, and C6003 printers. The kit includes 1Sets of 3 pieces and is compatible with the Ricoh Aficio series. Manufactured in China by Ricoh, this OEM kit is intended for long-lasting use and operates at a voltage of 220V/110V. The California Prop 65 Warning indicates that this product does not contain any harmful chemicals. Buyers can expect reliable performance and quality construction from this compatible unit.