SPEX SamplePrep provides products for grinding and pulverizing even the toughest samples. These include high-energy ball mills, swing mills, and cryogenic mills. Over the past few decades, the SPEX SamplePrep Mixer/MillÂ®, widely known as the â€śSPEX Millâ€ť, has become the industry standard for mechanical alloying applications. The high energy of the milling action, and the durability of the motor, allow running for extended periods. Weâ€™re also known for our Freezer/MillÂ®, the only â€śTrue Cryogenic Millâ€ť uses liquid nitrogen to pulverize samples regarded as impossible to grind. Our 2000 Geno/GrinderÂ®, is a high-throughput tissue lyser and also used for RNA/DNA extractions.