Replacement roller kits for old, noisy or broken rollers on sectional, track-style box truck doors. DURA-LIFT truck rollers features 1" steel wheels, 1" nylon wheels, and 2" nylon wheels a dual-caged 608ZZ bearing and a 6200ZZ bearing with protective front and rear covering, and a black-oxide triple-coated 2” stem. These products are perfect for Do-It-Yourself box truck door repair and maintenance.