Use the hollow glass stoppers to seal lab glassware such as flasks, separatory funnels, cylinders. Standard taper PTFE stoppers, Hollow, Penny Head - Scientific Machine Feature Made of Borosilicate Glass, which has low expansion rate, high strength, high hardness, high temperature resistance and resistance to 200 ℃ temperature difference. StonyLab 1 Pack Glass Stopper, Glass, Glass Stopper, Lab Lab Glassware Stopper Transparent Hollow Stopper At Rs 14 In Ambala | ID: 19003092988 Hollow Glass Stopper Hollow glass stopper, pack of 5., Made of Borosilicate Glass, which has low expansion rate, high strength, high hardness, high temperature resistance and resistance to 200 ℃ temperature difference. Why Choose StonyLab?. Manufacturer : StonyLab Scientific. Hollow glass stopper. Penny Head stopper. Size: 14/20 Joint. 14/20 Joint. Borosilicate Glass, Heavy Duty Design, Reusable and High quality; maximum withstand temperature 200C Grooves in the sides help prevent slippage. High light transmittance, high chemical stability, acid and alkali resistance.
