DONLAB CFP Glass 4-Neck Double Layer Round Bottom Reaction Flask Jacketed Reactor, with Four 24/40 Ground Glass JointsThe CFP series flask includes 100ml 10000ml capacity Double layer round bottom With Four 24 40 ground glass joints With two upper and lower water inlet and outlet The product is a heavy wall design made of high borosilicate glass material, which has a high thermal expansion coefficient, high temperature resistance, and can withstand large temperature changes.