The Master Lock 484 Master Lock Gate Valve Cover features a 86mm depth and 101mm stem opening for 203mm to 330mm diameter valve handles to surround the valve operating handle to protect against accidental valve opening. The unique, patented rotating design allows for easier installation in confined space applications. Tough, lightweight, dielectric Zenex Thermoplastic body withstands chemicals and performs effectively in extreme conditions. Includes high-visibility permanent safety labels.