This gauge features a centimeter and inches scale, a roundness chart, a chart for estimating percentage composition, 6 common Munsell soil colors, and a size classification chart with actual sand grains from coarse to silt fused to the plastic. Flexible and Waterproof with a nylon string for carrying. Measures 5" x 7". Inset image shows backside of card. Click on it for a better view. Availability: Usually ships the same business day Geotechnical Gauge 10010B$16.50, 10/$155.00 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.