EarrBOND BarrelEye Eartips use different combinations of earbuds and earphones for better comfortability and durability, different earbuds could also result in different tuning and characteristic for better performance.   As one of the leading brands in the earbuds market, not only has EarrBOND used professional grade materials in production for maximum quality, the design of earbuds could also help improve the performance of users' earphones.The new BarrelEYE is purposely designed for the tuning of different tones in earphones. With medical grade silicon used in the product, BarrelEYE could minimize the possibilities of allgery caused while wearing, where it could also improve the comfortability as well. BarrelEYE comes with three different interior structure design that give you different tuning experiences, where users can choose the most suitable combination depending on their preference. The product also provides two versions of hardness for users' best experience; the one in blue is the softer version, where the one in green is the comparatively harder version of BarrelEYE. Two Colours, Six Experiences BarrelEYE provides you 2 different versions of hardness, while Blue is the softer version and Green is the harder one. Different versions of hardness could ensure you maximum comfortability. Models: (A) BE 001B (Blue) Softer version Smaller Fit 3 Pairs (B) BE 002B (Blue) Softer version Standard Fit 3 Pairs (C) BE 001G (Green) Harder version Smaller Fit 3 Pairs (D) BE 002G (Green) Harder version Standard Fit 3 Pairs Size:  Please refer picture for the dimension (outer diameter / tube diameter / height). What's in the box ? 3 Pairs (same size) with different interior tube.