BAK 19-21 Chevy Silverado/GM Sierra Revolver X4s 5.10ft Bed Cover (New Body Style)Brand BAK Part Number 80130 Category Tonneau Covers Tonneau Covers Roll Up Condition Brand New Original Manufacturer Packaging Protect your valuable cargo with the RealTruck BAK Revolver X4sthe best selling, most secure do it all hard roll up bed cover. Building on the proven Revolver platform, the X4s delivers upgraded materials, enhanced weather protection, and an all matte black finish for a stealthy, refined appearance. As the most secure hard