Features: compressible liner creates a stable seal temperature range of -80c to 120c graduations are printed in bold, easy-to-read black ink and are accurate to +/-2% large white marking area provides excellent contrast for identification easy to write on flat surface polyethylene (hdpe) caps tubes include graduations molded into the conical bottom, ideal for pellet viewing and small volume quantification convenient zip-closure bag is a practical alternative to folding and taping opened bags max force (rcf) is 12,000g