1.This Permanent chip need to use with original chips
2.You just need one set of full original chips+Our own special refillable cartridge+our permanent chip,i think it is the best way for B508DN/308DN
3.But some clients will think if it need original full chips,why we need use this chips,it is no sense.But actually,original chips without our ARC Chip is only use one time,but iwith our ARC Chip,you can use over and over again.If you use our refillable cartridge+original full chips+ARC chip,inks are used up,you just refill ink into cartidges,then our chips can auto reset by itself and make original chip work again,and not change chips,just refilling ink,then printer can work again