Ace Stirrer Bearing, Mechanical Seal, model 2246456 is manufactured by Ace Glass. This product is a newly designed mechanical stirrer bearing for overhead stir motors. The non-shedding bearing is made from PTFE, Rulon® and PEEK materials. This stirrer bearing is also suitable for both vacuum and pressure applications as low as -0.6 Torr. Rated for up to 400 rpm.