BorosilÂ® brand Flasks are designed to deliver the best combination of thermal shock resistance along with physical strength and resistance to chemical attack. Borosilâs Bolt Neck Filtering Flasks are manufactured to withstand the demands of the modern laboratory. They are blown in special molds with a design to convey maximum mechanical strength. The neck finish is developed for strength and to ensure a proper stopper fitting.
100% Satisfaction Guarantee: At Mansion Labs, we want to be sure that the item you choose is the right one for you. Within 30 days of delivery of your order, you may return any merchandise purchased from Mansion Labs in its original condition with your email order confirmation or packing slip. Restocking fees may apply. On items over $275 shipping within the US, we will even arrange free pick up or pay for returns shipping.