KF Blind Flange - Duran Glass/Pyrex - Flanges - Hositrad Holland B.V.
Deschem Flange OD 150mm Glass Reactor Lid Single Neck for Lab Reaction Vessel: Amazon.com: Industrial & Scientific
Quickfit™ Borosilicate Glass Flange Lid Flange Bore: 100mm; Vertical Center Socket: 24/29; Side sockets: 19/26 at 0deg., 19/26 at 5deg., 19/26 at 10deg., 34/35 at 15deg. Products | Fisher Scientific
Flange sight glasses - China Donjoy Technology Co.,Ltd