About OPC Drum: Uniformly coated photo-sensitive component that is responsible to receive and transfer the image to final print. PrintStar OPC Drum is triple layered coated to deliver all around consistent and uniform ID (image density) from top to bottom and left to right.Economic, Efficient & Stable: Easy Replacement; High Performance. Premium Raw Materials, Perfectly Compatible; No Damage to Printers. Premium Compatible OPC Drums are produced to meet or exceed the performance of an OEM (Original) Samsung 104/104S OPC Drums at a far more reasonable price.Applicable Printers: Samsung 104/104S Compatible Drum Cartridge For Samsung 104/104S Compatible with Samsung Laserjet Printers ML-166x(1660/1661/1665/1666)