This Bulat black toner powder is designed for refilling cartridges used in HP LaserJet 5L, 6L, and 1100, as well as Canon LBP810 printers. The 3100 type 1.1 formula consists of a styrene-acrylic polymer mixed with iron oxide and inorganic additives to ensure consistent print quality. Supplied in a 140g plastic bottle with a secure screw cap, this Russian-bottled powder provides a practical solution for those who prefer to maintain their own equipment. It is well-suited for users looking to extend the life of their existing cartridges while keeping their documents crisp and professional.