Package Content & Size - 30pcs soldering iron cleaning sponge ( 15pcs yellow + 15pcs blue). Length: 60mm/2.36inch, Width: 40mm/1.57inch, Height: 11mm/0.43inch Material - This is a special heat sponge, soft and tough. It benefits from the rough and porous design, instantly expand several times after water absorption, has a good cleaning effect Features -The water-permeable sponge is soft, does not damage tools, and is cleaner than iron balls. The middle hole is designed so that the middle hole can easily scrape the solder from the tip Usage - Soak the high-temperature sponge in water, squeeze out the excess water after expansion, and rub it several times with a hot electric soldering iron tip to completely remove the oxide layer and welding slag on the soldering iron tip Advantage - The cleaning sponge does not evaporate water for a long time and then becomes dry, and can be reused after re-soaking Color: As Shown Material: Sponge Package Contents: 1 set * solder tip cleaner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.