Identify samples quickly using colored closures offered in green, white or natural, specifically designed for the 4.5 mL micro packaging vial.
Identify samples quickly with Thermo Scientific™ Nalgene™ PPCO Micro Packaging Vial Closures for 4.5 mL Vials, offered in green, white or natural. Polypropylene polymer closures are ready to use and have no O-ring to fall out or contaminate contents.