"Beware! Guard Rottweiler On Duty" Sign By SmartSign | 12" x 18" Aluminum Heavy-duty aluminum rectangle guard dog sign Sign lasts 10 plus years outdoor life Great water and chemical resistance Typical maximum temperature 168 degree F Mounts with screws or clips 100% rustproof aluminum Laminated for superior outdoor durability, chemical, abrasion and UV-resistance Signs can be mounted with screws or nails 10+ years of outdoor life 23&#034; Fence Bracket Attachment Hardware Kit for 24&#034; signs 17&#034; Fence Bracket Attachment Hardware Kit for 18&#034; signs Chain-link Fence Clips for signs 5&#034; to 72&#034; wide