Product Number Product Description SDS 23243 red PTFE/white silicone, diam. × thickness 8 mm × 0.060 in., for use with Screw Top vial, 2mL, 4.6mm I.D., 8-425 thread, pkg of 1000 ea Pricing 27277 red PTFE/white silicone, diam. × thickness 10 mm × 0.060 in