An original 2 1/2" length PROVED LEVEL GLASS, No. 208 by Stanley. The level glass measures 3/8" in diameter. This unused, old hardware stock level glass is in perfect condition and could be put directly to use restoring a Stanley sprit level or a level by another maker using an identical sized vial. Length = 2.50 Inches (Ref. Id No.: 371171) [Free Shipping]