pH Standard - Glass/Plastic

This artifact is a chlorphenol red pH standard with a 5.2 to 6.8 range.  It measures 9 7/8" x 2 13/16" x  9/16".
Abstract/Description: This artifact is a chlorphenol red pH standard with a 5.2 to 6.8 range. It measures 9 7/8" x 2 13/16" x 9/16".