Constructed from compressed open cell polyurethane foam which is securely bonded to a polystyrene shaft. Perfect to clean printer heads, keyboards, and to reach , great use for piezoelectric photo machine nozzles, water-based and most solvent head. Multiple uses: Swabs are also great to use around such as A/C and around your kitchen range. Specifically for cleaning sensitive equipment such as printers, microscopes, optical sensors and safe for solvent heads. Used in the electronics, semiconductor, drive, Optics-electronic, LCD,PCB,, IC, and industries. Head width: 0.5inch (15mm) Colour:orange Material:PP+sponge Size:about 130 x 15mm Package Contents: 100 x Cleanroom Detailing Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.