Ngwa ngwa nke karama mmiri ara ehi silicone bụ silicone, nke na-agbanwe.Enwere ụdị pacifiers abụọ maka imepụta karama, nke nwere ike ịgbanwe.Nnukwu dayameta nke karama ahụ bụ 7CM, nke dị mfe ihicha ma tinye mmiri ara ehi.Nhazi nke karama ahụ na-eme ka o sie ike ịkwagharị, karama ahụ na-agbaze, nchekwa ọkụ nwere ike ịdịte aka karị, a pụkwara igbochi nsị nwa ọhụrụ n'ụzọ dị mfe.
