Aim at market clss have leaking ink,our company will introduce the new clss 1.adopt high lucid pp material,tenacity is good It don't easy to broke in transportation 2.with balance fitting,the out box can detach and assembled,easy to assembied four color,six color ,seven color, eight color. xxxxx bottom of outer cartridge adopt heat sealability,instead of intrinsic ultrasonnic seal and stickiness box xxxxx over 99% and it don't appear leaking ink. xxxxx connect of cartridge and canal line adopt glue tuck,pressurize capability is ok!