Imported medical grade UV resin material Handcrafted IEM A large amount of ear canal data defines the shape, comparable to a custom-grade wearing experience Musical grade copper-zinc alloy horn sound tube, Knowles BA Drivers, 6 components, High, medium and low frequency 3-way crossover design, artist tuning, classic upgrade. Soundproofing 25DB. Listening more quietly 8 core 6N single crystal copper and OFC silver plated mixed wire, nice and durable Accessories include Pelican 1010 storage box, SpinFit silicone eartips, 3 pair(S,M,L) of blue eartips