JLT1026 Features: Top-read aluminum level Heavy duty aluminum frame assures accuracy Top read windows simplifies viewing the level vial in horizontal applications Quik-change vial easily fits into the precision-stamped cutout in the frame Plastic vial covers with clear acrylic lenses screw into place for easy vial access and replacement Quik-change replaceable vial covers Top-read window maximizes readability Durable acrylic vials are impact resistant Shock absorbing end caps protect frame Dimensions: Dimensions: 72'' H x 2.25'' W x 1'' D