It has a high quality zipper closure and holds 3 harmonicas. It’s small (5.5″ x 4.75″ x 1.5″) but it provides excellent protection for you three favorite, go-to 10 hole diatonic harmonicas of any brand. Also holds three 7 hole Kongsheng Baby Fat harmonicas.A hard, rubber-like outer shell and a black plush lining are precisely crafted together to make our Trio harmonica case by Kongsheng.