16pcs- 4-XS/4-S/4-M/4-L (B-NSEN) Comfort Noise Isolation Replacement Eartips Earbuds Ear Adapter for Sennheiser HD 1 Momentum M2IE I and Momentum G, Sennheiser CX 3.00 and CX 5.00 In-Ear Earphones 16pcs 4XS / 4S / 4M / 4L Comfort Noise Isolation Replacement Eartips Earbuds COMES WITH PROTECTIVE DURABLE BOX ORGANIZER: KEEPS YOUR ACCESSORIES FROM GETTING LOST AND BEING ALL OVER THE PLACE Compatible with Sennheiser HD 1, Momentum M2IE, Sennheiser CX 3.00, and Sennheiser CX 5.00 As Pictured Above. In-Ear Earphones are not included ! Check Product Description for Additional Information 16pcs - 4XS / 4S / 4M / 4L Comfort Noise Isolation Replacement Ear tips. This set contains multiple sizes so you can find your perfect size for comfortable hours of listening. Specialized Center Line Guard Stopper prevents the diaphragm of the earphones from falling within the ear canal and keeps your ear tips centered for maximum sound quality and comfort. These ear tips isolate sound, provide secure fit, and maximize comfort of your in ear device. Perfect fit and comfort for your ears, left and right. Great replacement for any damaged, scratched or defective Earbuds Ear tips. You can also use these to provide better hygiene - when you change often. With one hand hold the ear tip and the other, the In-Ear Earphone Driver. Place the Driver of the Earphone in the edge of the ear tip canal. Apply pressure and with a circular motion, twist with one hand clockwise and with the other the opposite direction  until the ear tip has fully covered the Driver of the Earphone. Once you have put them on properly, they will stay on securely.