24/40 Ground Glass Stopper Stonylab Glass Solid Stopper, 1-Pack Borosilicate Glass Stopper For 24/40 Outer Joint, Chemical Closed Bottom Reagent Bottle Stopper Convenient to clean and rotate, and side grooves can prevent slippage. United Scientific Glass Pennyhead Stopper, 24/40 from United Scientific™. United Scientific - Ensure airtight closures for your glassware items like flasks, cylinders, and funnels with this Pennyhead Stopper, featuring a closed bottom and taper Adamas-Beta ensures high quality and premium customer service. Stopper, glass, solid, penny-head. €7.12 * €9.62 *. Customers also bought. Flask F30, 1-neck, round bottom. From €3.64 * €6.00 ADAMAS-BETA Solid Glass Stopper for 24/40 Outer Joint, with Closed Bottom (1 Pcs) Product: Glass Stopper Joint: 24/40 Material: Borosilicate Glass Characteristics Ground Stopper for 24/40 Grounded Reagent Bottle Convenient to clean and rotate, and side grooves can prevent slippage. 24/40 Ground Joint Glass Stopper Lab Solid Glass Plug Laboratory Glass Ground Stopper for 24/40 Grounded Reagent Bottle