Ace Glass 9106-28 Precision Seal Septa for Neck O.D. 13 mm Tubing, Red Rubber - 10 pcs

Engineered for a precision fit (80% glass to rubber contact ) in standard taper glassware joints and tubes. Precision Seals are manufactured under "white room" conditions, from one certified raw material formulation for absolute consistency in all sizes, from lot-to-lot. Red color.

Note: Precision Seal is Registered Trademark of Sigma-Aldrich.