Johnson 9" Contractor Magnetic Aluminum Torpedo Level is a professional-grade tool that features 3 vials, 1 piece, full-length oversized cast reinforced aluminum frame with exclusive computerized, numerically controlled machined edges. The large, top V-groove accommodates pipe & conduit, while the extra strong, full-length magnetic edge ensures a secure hold on metal surfaces. The 360-degree acrylic yellow barrel vials are surrounded by white polymer surrounds for easy viewing, and the high-impact plastic covers protect the vials from damage. This level is also backed by a 1-year limited warranty.