Best4U Organic Photo Conductor Drum is compatible with RICOH MP4000, the paper handling with RICOH MP4000 Drum is more than 170000 and printing will be very smooth. Our RICOH MP4000 Drum is available in reasonable price. Our product is well tested, there will be no harm in your printer after using our product and it will be work properly in your Printer. Overall manufacturing defect is covered in warranty. Our product is tested before deliveries so please do not cancel your order after placing.