Optimize performance of your Spex SamplePrep Freezer/Mill grinders with a wide range of vial sets suitable for your application. Effective and versatile grinding vial for mixing and grinding samples. Vials are also suitable for slurry grinding. Use vial with multiple sample adapter 04576-66 in the Mixer/Mill grinders to process multiple samples at the same time. Hardness: Mohs 8 ½ +; Knoop 1400 - 1800. Typical composition: Major Elements ? W, C, Co; Minor Elements ? Ta, Ti, Nb