Perkin Elmer9 mm Pre-Assembled Blue Polypropylene Screw Cap with Natural PTFE/White Silicone Septa, 100/pkSKU · N9306360
Perkin Elmer9 mm Pre-Assembled Blue Polypropylene Screw Cap with Pre-Slit PTFE/Silicone Septa, 100/pkSKU · N9306203
Perkin Elmer9 mm Pre-Assembled Blue Polypropylene Screw Cap with PTFE/Silicone Ultra-Low Bleed Septa, 100/pkSKU · N9306362
Perkin Elmer9 mm Pre-Assembled Blue Polypropylene Screw Cap with Red PTFE/White Silicone Septa, 100/pkSKU · N9306202