Special designed aluminum body cartridge are made for Blister Pack Cartridge, ffs machines & coding machines. The absorbing material used is poly porous in various microns varying from 1 micron to 25 micron depending on requirement of customers. The absorbing capacity of these cartridge is quite high & the cartridges are hard so the impression is good. Cotton cloth knitted sleeves (covering ) are used to avoid direct contact of stereo with roller.