Polylok 44" Concrete Slab Bolsters with Runners - 3" Cover (41 Units per Box) - Ideal for Reinforcing Concrete Slabs, Foundations & Driveways

Polylok's slab bolsters with runners (beam bolster uppers) are used for supporting one layer of steel above another, and spacing them to required distances. May be used on soft material or fill. Our Slab Bolsters with Uppers are available in 44" lengths and can be easily fastened together for longer spans.