Bore size: 4mm, for earbuds nozzle diameter from 4.5-5.5mm. Two pairs of ear tips in one card. Upgraded sound, lengthened umbrella and softer silicon used. Ergonomically designed with the ability to spin in all directions and customized fit your ear canals. Legendary model for IEMs but also fits some of the TWS if you prefer a deep fit. CP100 gives deeper & clearer sound. Improves sound quality overall in bass, treble, and sound stage. The difference between CP100 and CP100+ mainly is the material and the colors. In terms of sound performance, CP100 gives a more balanced sound and CP100+ adds more details in the treble. All images shown are for display purposes. The actual product might vary in colors