BLIND FLANGE LOCKOUT DEVICE. Size: MEDIUM. Product Features: ? Device fully conceals flange bolts preventing access to the blind until all work has been completed. ? Adjustable device provides a tight fit, adapting to multiple flanged pipe applications. ? Four lockout holes allow for multiple workers to lockout device at one time. ? Durable aluminum and hardened steel construction withstands conditions indoors and out. Specifications: ? Recommended for use with NUT DIAMETER from: 1" to 1-7/8" (33.3mm-47.8mm). ? Pipe Diameter Range: 3-1/2" - 12" (88.9mm-304.8mm). ? Pipe Flange Width Range: 3-3/4" - 10-3/4" (95.3mm - 274.6mm). ? Max Shackle Diameter: 9/32" (7mm). ? Material: PA66+33% fiber and Q235 carbon steel. ? Operation Temperature: -40°F-200°F.