The GDS DIY spirit level is an impact-resistant spirit level in yellow polystyrene plastic that withstands temperatures between -15°C & +60°C. Unbreakable block vials with extremely high transparency & durability. Horizontal magnifying vial with luminous reflector. Easy to clean off cement. The vial radius is 200mm, which gives a sensitivity of 10mm/m with the tolerance in normal position ± 1.0mm/m. The vial fluid is a low viscosity, coloured oil mixture that gives the bubble the best po