Sounce In-ear earphones fixed silicone case Environmentally friendly material, soft and comfortable very High Quality. Size is Medium, can be used for housing diameter 9MM-13MM Perfectly solves the problem that the in-ear headphones are easy to fall, and the shaking is not tight. Pack 4 Pieces Earphone Ear Hooks. Replacement Earbuds Tips Bud locks Earphone Sport Grips Fins Wings. High-quality soft silicone, durable, flexible, removable, and replaceable. Comfortably locks earbuds in place during general activity or vigorous exercise. Installs around the body of earbuds produced by many manufacturers. Work with in-ear and ear-canal style earphones.