The Spec Ops Box Beam Level with Bungee features a Patented Tourniquet Bungee System that securely mounts the level to plastic pipes, 2x4s and other surfaces..0005”/inch and offer guaranteed lifetime accuracy for plumb, level and 45-degree pitches.Manufactured with box beam style aluminum construction and then precision milled for elite durability, this level also features three 33% higher visibility epoxy-locked acrylic block vials that deliver an accuracy of 0.