Clearly inform users of the status of cylinder contents. B-851 Rigid Economy Polyester e x ceeds OSHA's 50 lb pull force requirement for Lockout Tagout. Te x tured write-on surface allows for authorized signatures, dates and other special instructions. Has an average outdoor durability of 3-5 years. Withstands moisture, grease and dirt. Valve Tag FULL CYLINDER READY FOR USE Polyester 5.75x3 White on Green 10PK This listing is for Pack of 10