1、[Soft Silicone Material] The replacement earplugs are made of soft silicone material that can provide more noise isolation, stable and comfortable to wear, replaceable and detachable. 2、[Applicability] With a standard 4.5mm wide opening, compatible with over 98% of the earphones on the market. Suitable for inner hole from 4.5mm‑6.0mm wireless earphones or other wired earphones. 3、[Ergonomic Design] The earplugs can be worn comfortably in the ear, without sound fluctuations caused by the squeezing and deformation of the ear canal. Ergonomic design, long term wearing is not easy to fatigue. 4、[Good Replacement Eartips] Replacement ear tips are ideal for any damaged, scratched, defective or lost ones, give a new life and look for your wireless or wired earphones. 5、[36pcs Earplugs] 18 pairs of earplugs, 3 sizes, each size has 6 pairs of earplugs. (L/M/S 6 pairs each) Enough size and quantity allow you to find the perfect fit for your earphones.