"Compatible with Discord (2nd Generation), Rumble, and Rebel Earbuds.Elgin’s Silicone Replacement Ear Tips provide a comfortable fit and superior sound quality while significantly reducing harmful environmental noise.  When used with our Rumble and Rebel Bluetooth Earplug Earbuds, they provide an OSHA-compliant Noise Reduction Rating of 27dB and 25 dB respectively. Each pack includes 3 sets of ear tips (2 sets in Elgin Orange and 1 set in Stealth Black). They are available in Small and Large sizes.Depending on your work environment, we recommend replacing your ear tips every 1 to 2 months to ensure optimum hearing protection and cleanliness.Please note - For health and safety reasons, opened packages of this product are not refundable.  *Not compatible with our 1st generation Ruckus line of earbuds."