United Scientific? Fg5340-2000 Laboratory Grade Borosilicate Glass Heavy Wall Product Details Heavy wall borosilicate filtering flask includes a heavy-duty rim and a bolt neck with tubulation. Graduations are printed in durable white enamel. Manufactured from low-expansion Type 1, Class A Borosilicate 3.3 glass that complies with ASTM E438 Standard Specification for Glasses in Laboratory Apparatus. It is low alkali glass with a typical chemical composition of approximately 81% silica, 13% boric oxide, 4% sodium oxide, and 2% aluminum oxide. It is virtually free of magnesia-lime-zinc group, and contains only traces of heavy metals. Capacity: 2000mL (2L). Tubing Size: 1/2". Recommended Stopper Size: 9.5 Graduation Range: 600-2000mL. Graduation Interval: 200mL Made from industrial quality Borosilicate 3.3 glass, these flasks are built to withstand high temperatures and thermal shock. These flasks feature dual scale graduations per ASTM-E960 standards. All United Scientific flasks are dishwasher safe. Every United Scientific flask is manufactured using state of the art equipment. Every product undergoes various rounds of quality control, and is designed to ensure a smooth, consistent experience for our customers. Dimensions (OD X H): 170 x 305mm 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.