High quality memory foam tips, comfortable, and secure-in-ear fit; The memory foam tips noise isolation offers- superior audio- experience enhanced bass- and good seal block out external noise.. Application: for WF-1000XM4 and other wireless Bluetooth-compatible headsets, slow-rebound. Noise reduction, super soft, comfortable and safe, suitable for exercise. Does not interfere with charging-; Offers- a superior sound- experience. Package Includes: 1Pair x Earphone Earpads Specifications: Size: -S/-M/-L Color: Black/Gray Material: Sponge Fit for: for WF-1000XM4 Earbuds S-Size: (approx-) Outer Circle Diameter 11mm - Inner Mounting Hole Diameter: 3.8mm-5.5 M-Size: (approx-) Outer Circle Diameter 12mm - Inner Mounting Hole Diameter: 3.8mm-5.5 L-Size: (approx-) Outer Circle Diameter 13mm - Inner Mounting Hole Diameter: 3.8mm-5.5 Quantity: 1 Pair note: Does not include Earphones Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment