Air Source Lockout BD-Q11 a. Made from No.304 stainless steel. b. Applied to the fittings and prevents it from being reconnected to the pressurized air source. Fits virtually all pneumatic fittings used in manufacturing facilities. c. Diameter: 196mm length ×35mm width ×3mm thickness. d. Used together with safety padlocks and safety hasps. e. Available in four lock holes for locking out.