mini66 Bearing Isolators are newly introduced to "provide permanent bearing protection in applications with limited spaces." They're declared "the smallest bearing isolator available to be rated IP66." With 0.375-in. / 9.52 mm overall length, they protect against both water and dust ingress on applications with very limited space, notes the manufacturer. Isolator technology allows for permanent bearing protection on a wider range of rotating equipment. While contact seals wear and become ineffective over time, the new isolators' non-wear design continues to protect against contamination and lubrication loss.