Save $250.00 per printer! If you have fine mechanical skills. Developed for resetting drum life warnings on Oki c3300, c3400, c3400n, c3520 MFP, c3530 MFP, C3600, MC360 series printers This is for one kit, to reset any color drum: Yellow, Magenta, Cyan or Black. It is compatible with any color drum cartridge in your Oki c3300, c3400, c3400n, c3520 MFP, c3530 MFP, C3600, MC360 printer. Please note: pictured drum is not included - reset kit only:installation manual and new Fuse for the drum as on picture copied from our installation guide. Save over $60.00 on each drum! Reduce waste! Works with any color Drum cartridge: Yellow, Magenta, Cyan or Black. This is high quality 100% compatible new fuse to reset drum life counter of Okidata c3400, c3400n, c3520 MFP, c3530 MFP, c3300 color printer. After installation, drum life will be set to 100%. It takes about 30 minutes to install this kit. You must have good mechanical skills to do this job. Spend 1/2 hr and get 100% more life out of used drum you already have ! Please contact seller for more info Free tech support by e-mail ! Phillips, small flat head screwdrivers and soldering are required, fuse and color photo illustrated instructions included. Please note: used drum you have must be in good mechanical working condition prior message "order drum" or "replace drum" appeared. What feedback my buyers posted? "WOW this product works!! I'll keep buying from thiser!!!" Worked BETTER than expected!! Will definitely use again! Thanks A+++ I Thank You for saving me so much money, Will return! Thanks! I'll be buying more in the future. Thanks for reading!