Ace Glass 7643-102 10/30 PTFE Sleeve for Joints, 0.05 mm - 12 pcs

This sleeve provides a vacuum-tight seal to a ground joint without grease wherever used. The sleeve is an elongated cone, PTFE, 0.050 mm (0.002 inches) thick, accurately tapered to fit tightly over the male ground glass cone. Sleeve completely eliminates the problem caused by seizure of joints, as well as precludes contamination due to stopcock lubricants and leaking ground joints. Sleeves are inert, usable to 280 degrees C and will withstand low to medium vacuum.