1、Eco-friendly Special Design, No Damage to Cartridges: The white color-absorbing sponge is made of proprietary eco-friendly foam material, specifically designed for cleaning cartridge heads, ensuring no damage to your precious cartridges during the cleaning process. 2、Quick Color Absorption, Easier Color Change: Unique pore size design can quickly absorb the residual ink pigment on the cartridge head, making it easy for you to change the color of the cartridge, improving the efficiency of your work. 3、Safe and Hygienic, Easy to Open: Equipped with a special cover paper that is easy to tear and of moderate thickness, it ensures hygienic safety during use and is convenient for storage and carrying. 4、Easy Cleaning, No Residue: The cleaning process is simple and quick, just wet the sponge with a small amount of water, insert the cartridge, and gently slide to wipe, leaving no residue or lumps, making your cartridge as good as new. 5、Large Area Sponge, Cost Saving: The large area design of the sponge can generally absorb the color of 3-4 times of pigment, reducing the need for frequent replacement of cartridges or changing water cups, saving you valuable time and material costs. Qty: 6pcs, 12pcs, 18pcs, 36pcs Package size: 20.5*13.7*2.8cm(6pcs, 12pcs), 20*14*10cm(18pcs, 36pcs) Package weight: 29g(6pcs), 55g(12pcs), 137g(18pcs), 287g(36pcs) W24281-6 6 * Cup W24281-12 12 * Cup W24281-18 18 * Cup W24281-36 36 * Cup