Features: Material: Made of sponge, they are practical and safe for human. Application: The filter cotton is used in the nasal suction device to filter nasal mucus and impurities, etc. Easy Operate: It is easy to operate, simply replace your old filter with new ones. Universal: Can be used with a variety of nasal suction devices. Quantity: 1pack has about 100pcs filters, can meet your daily need. Specifications: Item type: Nasal aspirator filter Material: Sponge Color: Random color Size: About 12 x 10mm/0.47 x 0.39inch(diameter x thickness) Package includes: Mechanical bidet 100pcs/pack?x Nasal aspirator filters Notes:? Transition: 1cm=10mm=0.39inch? 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!? 2. Please allow 1-3cm measuring deviation due to manual measurement.