United Scientific? Fg5340-1000 Laboratory Grade Borosilicate Glass Heavy Wall These heavy wall filtering flasks are designed with heavy-duty rims and bolt necks with tubulation. 1) Borosilicate glass , 2) Graduations printed in durable white enamel , 3) Temperature range: -50C (-58F) up to 500C (932F), 4) Dimensions: 138mm Dia. x 245mm Hgt., 5) Tubing size: 3/8" Product Features Capacity: 1000mL (1L), Tubing size: 3/8" Graduation Range: 400-1000mL, Graduation Intervals: 50mL 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: 138mm Dia. x 245mm Hgt. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!