Expert quality with highly visible red opti vision tilted vial which allows single bubble view over 90 and front viewing plumb site dual view red effect vial aluminium box section extrusion with milled base not 1800mm curved top electrostatically powder coated and baked with polyester acrylic paint ergo grip nonslip soft grip handles tough bi material end caps anti slip wall pads and vertical vials accuracy 05mm per 1m 0029 in standard position manufactured for draper tools by kapro sold