hp toner cartridge seals are exact similar to the the original ones .The pastern is imported from japan to guarntee that the toner cartridges don't leak toner.
Following types of  toner cartrtidge seal(sealing tape) are available.HPQ2612A / Q2613A/ CB435A / CB436A / CC388A
Q2624 / C7115A / C3906A / C3903A / C3906A / C3906A/ C3909A / C4092A / C4096A / C4127X / C4129X / Q5942A /
Q5949A / Q6511A / 92274A / 92298A and Canon FX-3/
EP-22 laser toner cartridges.