Cheap And Discounts Developer Unit Chip Image Imaging Unit Drum Chip for Konica Minolta BizHub C 3350 C 3850 C 3850FS C 3850 FS C 3850-FS IUP22 Wholesale. Buy Directly From Merchant Toner Cartridge Chip Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.