1Made of A6 protein material, high elasticity and softness. 2Easy To Install: Just remove the old one and install the new one. 3Headphone foam enhances the bass performance of the headphones. 4Make the top of the head not feel hard and uncomfortable. 5Suitable for Sennheiser HD25 PC150 PC151 PC155 headphones.Features: Made of A6 proteinmaterial, high elasticity and softness.Easy To Install: Just remove the old one and install the new one.Headphone foam enhances the bass performance of the headphones.Make the top of the head not feel hard and uncomfortable.Suitable for Sennheiser HD25 PC150 PC151 PC155 headphones.Let the headphones look new, soft and comfortable. Specification: Material:Grade A6 imported protein from Japan Color: Black Use range: for Sennheiser HD25 PC150 PC151 PC155 Size: approx. 12.8 * 1.3 * 1.2cm / 5.04 * 0.51 * 0.47inch Weight: about 6g Package List: 1 * Headset Headband Cover