Browse Our Selection › Squibb Separating Funnel, 100ml - 19/26 Plastic Stopper, PTFE Key Stopcock, Graduated - Borosilicate Glass - Eisco Labs Image 1 of 1 Squibb Separating Funnel, 100ml - 19/26 Plastic Stopper, PTFE Key Stopcock, Graduated - Borosilicate Glass - Eisco Labs $30.80 Borosilicate glass with interchangeable plastic stopper and PTFE � Key stopcock. Graduated. Cap. 100 ml, Socket Size 19/26 Quantity: Add To Cart Added! Borosilicate glass with interchangeable plastic stopper and PTFE � Key stopcock. Graduated. Cap. 100 ml, Socket Size 19/26