Cosmetic Glass Bottle Essential Liquid Bottle Gray Plug $ 12.37 Product information: Product Name: 13 # Butyl Rubber Plug Product color: gray Product level: Excellent Single item weight: 0.8g Product features: Suitable for use in national standard 13 caliber penicillin bottles, penicillin bottles, etc Packing list: Bottle stopper * 500pcs Product Image: