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 150pcs filters can meet your daily need.Specifications:Item type: Nasal aspirator filterMaterial: SpongeColor: Random colorSize: About 12 x 10mm/0.47 x 0.39inch(diameter x thickness)Package includes: Mechanical bidet1Pack x Nasal aspirator filtersNotes:Transition: 1cm=10mm=0.39inch1. 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.