This non-sterile low profile micro packaging vial closure is molded of high-purity, low metal-content polypropylene copolymer (PPCO) resin, making it excellent for PCR reagents. The green color allows for quick identification. The leakproof closure is non-cytotoxic and non-pyrogenic, and meets the requirements of USP Class VI (current edition). Fits 0.5, 1.5, and 2.0mL micro packaging vials