Crown 58RL12 5/8" OD X 12" Long High Pressure Red Line Boiler Gauge Glass (Boiler Level Sight Glass) Does Not Include Gaskets Or Friction Rings. For Gaskets See GGW#3 And Friction Rings See 58BW Made From Duran Brand Redline Tubular Glass. The Red Stripe On A White Backround Gives A Special Optical Effect Which Makes The Liquid Level Stand Out Clearly. This Makes For Easy Viewing Of Liquid Levels From Across The Room. This Glass Is Widely Used In High Pressure Steam Boiler Applications. Easily Cut To Size Using A Gauge Glass Cutter (Sold Separate). Specifications: 5/8" O.D. 12" Length Maximum Recommended Working Pressure (PSI) At Temperatures Up To 150°F 335psi Steam Boiler Up To 425°F 280psi
