DR312 OPC Drum Cleaning Unit for 227 287 367 BH227 BH287 BH367 7528 7522 AD289S 369S The DR312 OPC Drum is designed to support consistent printing performance across multiple printer models including 227, 287, 367, 7528, 7522, AD289S, and 369S.With a 3dB bandwidth of 287 and controlled content at 105℃, this drum unit helps maintain stable toner transfer and reduces the likelihood of print defects.Engineered for straightforward installation, the unit features an ergonomic design that allows for quick replacement and integration into compatible printer systems.Its construction supports in regular print environments.This drum cleaning component is built to align with the specifications of the listed models, offering functional compatibility for users seeking a direct replacement.The design proper fit and performance across the supported device range, making it a practical option for maintaining printer functionality.