Dinglab,24/40,Glass Stopper,Lab Bottle Plug,Glass Penny Head,Glass Hollow Stopper ,for 24/40 Outer Joint, with Closed Bottom,,Lab Glassware,2pcs
Be Made of G3.3 borosilicate glass.
Annealing Point ------560℃
Linear Coefficient of Expansion ------ 32×10-7/℃
Softening Point ------820℃