Aluminium rectangular profile with reinforced ribs, together with Stabila installation technology, ensures accuracy and a long service life. Vials and measuring surfaces align perfectly during the production process and are permanently connected. Vials are highly transparent with hard-wearing acrylic glass and precision-ground inner contours and fluorescent liquid. Electrostatic Powder-Coated Thick-Walled Aluminium Section Non-Magnetic Base 1 x 90° & 1 x 180° Vials Accurate to ± 0.75mm/m in Reverse Position Protective Plastic End Caps 2 Year Guarantee Electrostatic Powder-Coated Thick-Walled Aluminium Section Non-Magnetic Base 1 x 90° & 1 x 180° Vials Accurate to ± 0.75mm/m in Reverse Position Protective Plastic End Caps 2 Year Guarantee