Kaos Red Silicone Hollow Plugs are made with implant grade silicone, made in the USA, and available in sizes 6G (4mm) up to 1 inch (25mm). Its hollow back and soft, squishy design make them comfortable to wear. The wearable surface is 10mm. These plugs should be washed with mild, non-scented antibacterial soap and water, and should never be used for ear stretching. Sold in pairs - 2pc.