1. Product Overview The PRB45 is an integrated heavy-duty agricultural hub bearing unit specially developed for harvester packer rollers. It adopts a double-row ball integrated structure with multi-layer composite sealing, supporting heavy radial loads in muddy, crop residue and high-dust farm environments, equipped with grease fitting for regular re-lubrication to extend service life. 👉 Get a quote within 24 hours for your project 2. Technical Specifications Model PRB45