PTFE 34/45 to KF25 Flange Adapter with Gasket Short Path Distillation: Amazon.com: Industrial & Scientific
24/29,ptfe Standard Stopper, Stirrer Bearing,adapter,7mm,24# - Laboratory Bottle - AliExpress
Amazon.com: Ewigkeit PTFE Teflon Tube with PC4-M6 Pneumatic Fitting and PC4-M10 Straight Quick in Fitting for 3D Printer 1.75mm Filament(Pack of 9cs) : Industrial & Scientific