Indicating Tubing -
Clear .400" O.D. tough, shatterproof butyrate. Pressure connection end is bent to provide over pressure protection when used as an inclined gage. One 4-1/2' x 3/8" Tygon tube included for pressure source connection.

Scale -
Stark white high-impact styrene, 21" long. Adjustable for precise zeroing.

Markings -
1" major, .2" minor graduations on high range; .02" graduations on low range (50 mm major, 10 mm minor graduations on high range, 10 mm major, 1 mm minor graduations on low range for metric model). Silkscreened in black on stark white for positive definition. Acrylic-coated for permanence.