... approval. Good quality with lowest price Detailed Description:- Material: PU foam- Size: 24mm(H) x 13mm(Diameter)- Shape: bullet,cylinder ... box, 1 pair/plastic container, 1 pair/aluminum canister,etc- Ear plug with pillowpack,suitable for use when travelling,learning,sleeping ... ,etc- Adjust the hardness of ear plug according to customers request. PU Foam Ear Plug