网页CM606550BTO-9 3 mm Thick, Red High Temp Ultra Low Bleed GC Septa, 9 mm Diameter $16.22 CM606550BTO-9.5 3 mm Thick, Red High Temp Ultra Low Bleed GC Septa, 9.5 mm (3/8") Diameter $17.68 CM606550BTO-11 3 mm Thick, Red High Temp Ultra Low Bleed GC Septa, 11 mm (7/16") Diameter $17.85