Specifications: The cap features an inner diameter of 8.5mm and an outer diameter of 9.8mm, with an inner aperture of 7mm. The cap's dimensions, including a 45mm inner diameter and a 31mm height, culminate in a total height of 60mm, ensuring a and leak-proof performance. Designed for Durability: This 3-port stainless steel bottle cap is autoclavable at 140°C, ensuring it withstands high temperatures without rusting. Its robust construction guarantees long-term durability and reliability in demanding laboratory environments. Versatile Compatibility: Specifically engineered to fit GL45 neck size bottles, this cap is ideal for securely managing liquid mobile phases. The large size accommodates silicone tubing with an inner diameter of 7mm/1.78inch, making it a versatile choice for various lab setups. Optimal for Liquid Sampling: Enhance your laboratory's liquid handling capabilities with this stainless steel bottle cap. It's designed to facilitate easy and efficient sampling from mobile phase bottles, ensuring a smooth workflow and precise results in scientific research.