311396 unitized sealed bearing. Internal diameter 39mm, external diameter 72mm, overall length 37mm. Back to back cone set with split inner raceway. Suitable for use with ALKO 2051 euro, Knott 250×40, 200×50 (10″) and Avonride ‘Y’ assemblies. Economical replacement well suited to light and heavy industrial applications. Also available as a display packed item, MP1814. ALKO reference – 581169. Knott – Avonride reference – 45887-11 and 571006.