Are you looking for a professional and practical Flip-up Vial Cap? , ! Our Vial Sealer must meet your needs. This Flip Top Cap is made of aluminum, plastic material, durable and sturdy for use. Fine workmanship practicality and durability. Features -Color:Blue -Material:Aluminum, plastic -Size:2.20X2.20X1.00cm/0.86X0.86X0.39in -Note: suitable for 20 mm outside diameter of bottle mouth -Durable Material: This durable aluminum plastic cap is designed to last for a long time, ensuring extended durability -Easy storage and retrieval with the buckle design: the buckle design of this Stopper Plug allows for easy storage and retrieval, making it convenient to use -Enhanced sealing for improved freshness and protection: with its enhanced sealing capabilities, this Flip-up Vial Cap provides improved freshness and protection for the contents inside -Versatile compatibility with various bottle types: this Sample Jar Lid is compatible with various bottle types, making it versatile and suitable for different needs -Convenient and Practical: Every detail is carefully crafted, experience the high durability and practicality Package list: 600 x bottle caps