Material: plastic (polyamide 12). Autoclavable: yes. Note on grinding tolerances for ground glass joint 14 Max. outer Ø at the narrowest point of the conical ground joint: 17.2 mm (larger Ø are too wide for the holder and cannot be held) Min. outer Ø at the widest point of the conical ground joint: 18.0 mm (smaller Ø are too narrow for the holder and would fall out) Holder for glassware with ground glass joint 14, extended for SmartRack ® The module corresponds in design and function to the module holder for glassware with ground glass joint 14. However, the extended variant is particularly suitable for easily mounting particularly large round bottom flasks or separating funnels, for example. Delivery without glassware.