This classic Heavy Duty professional level, Kapro 985 Apollo™, offers so much that its competitors do not. These strong, robust levels have 3 hand calibrated, solid acrylic vials with an accuracy of ‹ 0.0005 in./in, and lifetime warranty on the accuracy. The 985 has attained the prestigious VPA Germany tested seal, setting it apart from others like it on the market. Let's not forget the Dual-View Plumb Site feature. Make tedious side views a thing of the past with our patented design by viewing straight down plumb on the vertical.