OFE1199 Features: * Solid block acrylic vials won"t break, leak or fog * Dual molded rubber end caps for extreme shock resistance * Milled edges for accuracy * Ergonomic rubber hand grips * No. of Vials: 3 * Vial Material: Acrylic * Body Material: Aircraft Aluminum Specifications: * True Blue vials are accurate to within 0.00050"" per inch in all 10 level and plumb working positions * 300 view top-reading level vial