Air Line Regulator Lockout Fitting Lockout Type Pneumatic Regulator For Maximum Padlock Shackle Diameter 3/20 in For Number of Fittings 1 Maximum Number of Padlocks 1 For Use With Intermediate SMC Model AR 3000 Intermediate SMC Model NAR 3000 Includes Allen Wrench Cap Lockout Lockout Color Red Lockout Material Aluminum/Fiberglass Reinforced Nylon Maximum Temperature 248 Degrees F Minimum Temperature -4 Degrees F Outside Diameter 1.35 in Overall Height 1.54 in