5ml MacrewTube Screw Caps, Amber, 200/pk, 200PK

Tubes are manufactured or exceptionally high-quality, transparent polypropylene without the use of slip agents, plasticizers, mold release agents and biocide substances. Offer exceptional centrifugation stability up to 25,000 x g; autoclaving with cap off; (121°C, 20 minutes); withstand temperatures from +121°C to -196°C; and writing surface on flat cap and side wall for quick sample indentification.Caps offer complete sealing for minimal evaporation rate during long-term storage. Center of caps feature membrane for easy puncture and access with a syringe/needle. Once punctured, the opening can be useful for venting internal pressure during heating. Screw Caps Only Lip Seal, Flat Choice of colors: Natural, Amber, Blue, Green, Red, White, YellowShipping Weight: 2 lbsShipping Dimensions: 10.00 x 8.00 x 8.00Research or further manufacturing use only, not for food or drug use.