Collection: Chemistry & Jointed Glassware

Start from the standard taper joint size (14/20, 19/22, 24/40, 29/42 …) and keep it consistent across flask, head, condenser and adapter — the ordering table on every product lists the joint for each catalog number. Kontes apparatus here is borosilicate 3.3 glass; choose PTFE or glass stopcock plugs, reservoir or side-neck variants, and complete assemblies versus body-only parts from the same table. Microscale kits (Williamson, MICROFLEX 14/10) bundle the matching pieces for teaching labs.