Pagow Buchner Funnel Flask Adapter Set, Filter Adapter Cones Set, Tapered Collar Product Details Specification: Material: Neoprene Size: Set of 9 neoprene adapter cones designed to fit Buchner and fritted glass funnels Set of 9 different size neoprene adapter cones designed to fit Buchner and fritted glass funnels Made of Neoprene: These adapter cones are designed to fit around the stem of Buchner funnels, porcelain filters (minus headpieces), and fritted glass funnels. Extremely useful in the reverse flow cleaning of filter crucibles. Widely Used:Perfect for supporting funnels, Gooch crucibles, filter tubes and other apparatus that are routinely used in filtration assemblies. With different sizes of adaptersL: can be used individually or in a nested combination with ones or more adjacent sizes. Fully autoclavable:Fully functional even if they are not tightly fitted around the stem of the funnel being used. They are also an excellent alternative to boring special sized holes in rubber stoppers, or using the more unstable rubber filter aid. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.