From Brady, this plug lockout helps protect your items. It accommodates a maximum of one padlock with 9/16\ padlock shackle maximum diameter. It is made of polypropylene and comes in red. The length is 3-1/2\" long. It comes with the following legend: \"Danger Locked Out Do Not Remove\". It has a voltage of 110. Standards include: OSHA 29 CFR 1910.147."