Laboratory table top three roll mill by ross, model is 2 x 5, serial # na. Features table top design with 2" diameter x 5" long rolls, all rolls are cored for temperature control fluid with single inlet and pooling discharge to single inlet, adjustable end plates, front discharge tray with scraper knife, manually adjustable roll position, 1/2 horsepower motor by master. See demonstration video on our youtube channel at this link https://youtu. Be/srqcg-kimj0