These Endecotts and Impact Test Sieves, Industrial Sieves, and Lab Sieves are all of the highest quality and have been designed for accurate and efficient particle size analysis. Both Endecotts and Impact are UKAS accredited for the calibration of laboratory test sieves. For accurate dependable results you can't buy a better test sieve than an Endecotts sieve, the combination of the many features and the quality of manufacture make these test sieves a perfect measuring instrument.