308SZZ4 Mast Guide Radial Bearing For Industrial Trucks Bore 1.5748"One New Aftermarket Replacement Mast Guide Radial Bearing for Industrial Trucks This MRC 308SZZ4 is a single row radial deep groove ball bearing designed specifically as a mast guide roller for forklifts and industrial lift trucks. Mast guide bearings are mounted on the fork carriage and facilitate smooth vertical movement as the forks are raised and lowered, handling high radial and intermittent thrust loads during operation. The double sealed (ZZ)