Externally graduated from plug up to 1000 ml: 0-1 ml x 0.1 ml; 1-10 ml x 0.5 ml; 10-40 ml x 1 ml, 40-100 ml x 2.0 ml, with lines and numbers at 250, 500, and 1000 ml. Easy to clean by removing the leak-free plug. Styrene-acrylonitrile, with low-density polyethylene plug.