Product Size: You will receive 9pcs of filter adapter cones, 1pc each in 9sizes, it can be flexibly used for filtering equipment of various sizes High Quality Material: Buchner Funnel Flask cones adapter is made of high-quality silicone, with good elasticity, smooth surface, convenient and easy to use, and can maintain good sealing performance Strong Functionality: This filter adapter cone can be used individually or interconnected with other devices, reducing the risk of damage to the glass valve stem Widely Used: Filter adapter cones set providing perfect support for commonly used filtering components such as funnels, crucibles, and filter tubes, widely used in laboratories, and achieving good experimental results in sealing Widely Used: Filter adapter cones set providing perfect support for commonly used filtering components such as funnels, crucibles, and filter tubes, widely used in laboratories, and achieving good experimental results in sealing