Browse Our Selection › Squibb Separating Funnel, 500ml - 24/29 Plastic Stopper, PTFE Key Stopcock, Graduated - Borosilicate Glass - Eisco Labs Image 1 of 1 Squibb Separating Funnel, 500ml - 24/29 Plastic Stopper, PTFE Key Stopcock, Graduated - Borosilicate Glass - Eisco Labs $47.35 Borosilicate glass with interchangeable plastic stopper and PTFE � Key stopcock. Graduated. Cap. 500 ml, Socket Size 24/29 Quantity: Add To Cart Added! Borosilicate glass with interchangeable plastic stopper and PTFE � Key stopcock. Graduated. Cap. 500 ml, Socket Size 24/29