Vial set Spex steel-jacketed tungsten carbide for wet or dry grinding/mixing in extreme environments, vial size 2 1/4 inch (5.7cm) diameter x 2 1/2 inch (6.35cm) long, the screw-on caps and body are 304 stainless steel, lined with tungsten carbide, gaskets are Viton for enhanced resistance to heat and chemicals, includes two 7/16 inch (11.2mm) tung