The Axygen 0.5ml thin-wall flat-cap PCR tubes are available in a variety of colors and Maxymum Recovery (for your most precious samples). * Ultra-thin and consistent wall thickness for precise thermal transfer. * Manufactured for 99.9% virgin polypropylene. For smaller samples see our "0.2mL Flat Cap PCR Tubes":/core_products/02ml-flat-cap-pcr-tube or our "0.2mL Domed Cap PCR Tubes":/core_products/02ml-domed-cap-pcr-tube Also see our "96-well Storage Racks":/core_products/pcr-tube-racks 05ml-flat-cap-pcr-tube 140 true 0.5mL Flat Cap PCR Tube