Features:
- Break-resistant acrylic block focus vials with 20% magnification and luminous backing
- Rugged 6063 aluminum alloy frame provides the highest accuracy for a perfect measuring result
- Wide handles for use outside of the screeding area
- Support beam runs down the middle of the interior for strength
- Lifetime guarantee against leakage and fading of vial with proper use of the level, vials will neither leak nor fade in the sun
