These high purity, seamless extraction thimbles are used with Soxhlet Extractors in the analysis of materials such as food and soil in the analysis of fats, oils, grease, pesticides, pollutants, etc. Remember, thimble diameters are expressed as inner diameter, not outer diameter. To get the outer diameter add 2x the wall thickness an you will have the outer diameter. Height measurements given are actual "top to bottom" measurements, not inner dimensions.