Kapro 930-16 Smartcast Aluminum Professional Mason-Foots Level with Optivision Red Vial, 16-Inch Length Optivision red horizontal vial creates highly visible red bubble edges, for exact placement between the reading lines and optimal vision in bright and low light Tilted horizontal vial with a direct line of sight for easy viewing Bridge at horizontal vial for increased toughness and a continuous marking surface Heavy-duty cast aluminum tapered (trapezoid) body Shock-absorbing rubber strike pads and end caps to withstand trowel blows and protect the level's integrity