Universal horizontal bubble vial designed to mount on grade rods for quick, visible leveling feedback. Key benefits Clear horizontal indication: universal horizontal bubble is easy to read, helping you confirm level quickly on site. Simple compatibility: fits standard grade rods with diameters from 1.00 to 1.25 inches, so it works with most common rod models. Compact size: 85 mm (3.35 in) length keeps the vial unobtrusive while providing a stable reference point. Durable construction: made of plastic for reliable everyday use without adding significant weight. What it solves Eliminates guesswork when setting or checking a level on a grade rod. Speeds up routine surveying and grading tasks by giving an immediate visual reference. Keeps equipment lightweight and easy to handle while providing a long-lasting vial. Specifications Function: horizontal bubble vial for grade rods Size: 85 mm / 3.35 inch Compatibility: fits grade rods 1.00 to 1.25 inch in diameter Material: plastic Use scenarios Surveying: attach to a grade rod to verify horizontal alignment when taking elevation readings in the field. Construction and concrete work: check rod level quickly while establishing grade lines for forms, footings, or slab work. Landscaping and site prep: confirm level references when staking out terraces, retaining walls, or irrigation runs. No additional tools required for visual leveling; designed to integrate with standard grade rods and provide a clear, dependable horizontal reference.