Toner powder imported and repacked by s v technologies is one of the best toner powders found in the market we have tested ourselves before selling this product in the market For example We have tested on hp 12a cartridge we get 2000+ copies per 120 grams of powder.at an average of 25% coverage area. The advantages of our powder is the drum will not worn out until 3 to 4 cycles because of the smoothness of the powder. We have also seen the breakdown of the fuser units are less. Specifications Replace for hp 12a toner powder Rigorous Quality control system Defective rate :<0.2% Works on Tracing Sheet and DTP Works Catridges : 12A/49A/15A/53A Printer models: HP LaserJet 1010,1012,1018,1015, 1020,1022,1022n,1022nw,3015,3020, 3030.3050,3052,3055,1160,1320, 1320n,1320nw,1320tn,3390,33922410, 2420,2420d,2420dn,2420n, 2430,2430dtn,2430n,2430t,2430tn, 4200,4200dtn,4200dtns,4200dtnsl, 4200n,4200tn