Blind Flange Lockout Device, Color Red, Nut Dia. 0.790 in to 1.380 in, Fits Pipe Size 1/2 in to 3 in, Flange Size 13/16 in to 1-5/8 in, Max. Number of Padlocks 4, Padlock Shackle Max. Dia. 9/32 in, Material Aluminum/Steel, For Use With Pipelines, Temp. Range 40 Degrees to 194 Degrees F, Standards OSHA 29 CFR 1910.147