The Master Lock Lockout Gate Valve Cover has Zenex composite body, which withstands chemicals and extreme temperatures ranging from -57 C to +177 C. The cover completely surrounds the valve handle to prevent accidental operation. The unique patented rotating design allows for easier installation in confined spaces and insulated pipes. The Centre knockout can be removed for rising stem gate valves. Device can be locked with up to 2 padlocks. 'Danger DO NOT OPERATE' label supplied.