Inert PTFE stirrer bearing. Features a totally enclosed bearing body for non-shedding, anti-whip, chemicallyresistant design. The bearing can also be used in slight vacuum or slight pressure applications. The design has a composite PTFE/PEEK main internal seal and a specially fabricated glass ball-bearing for rigidity and smoothness during lengthy operation. Maximum recommended speeds up to 500rpm continuous operation. Ideal for glass, metal, or PTFE stir shafts. Bottom is a molded, inner standard taper joint. Average length is 96mm and 45mm O.D. at bearing center.