Gestetner Katun Compatible OPC Drum Kit which Contains (1) OPC Drum, (1) Drum Cleaning Blade, (1) Charge Roller Wipe, (1) Developer Measuring Cup, (1) Rebuild Instructions. For use in Gestetner DSM 415 , DSM MP 161 L , MP 171 , MP 171 F , MP 171 LN , MP 171 SPF , MP 201 F , MP 201 SPF