(1,000g) BULK Toner Refill for OKI B4400, B4500, B4550, B4600 (NO Chip) | eBay
Amazon.com: Genuine Okidata Toner Cartridge Black 3k B4400 B4600Type 9 Per Unit : Office Products
Compatible Replacements for Okidata 43502301 (Type 9) Set of 2 Black Laser Toner Cartridges for use in Okidata B4400, B4400n, B4500, B4500n, B4550, B4550n, B4600, B4600n, and B4600n PS Printers - Walmart.com