Our Temperature Check BigBoss A-Frame signs come with a heavy-duty thermoplastic frame with a contoured profile to deflect wind up to 30+ mph. You can add sand or water (or a mix of both for the heaviest option) to the sign ballast port for greater stability. The printed sign panels offered with the BigBoss Kit are made from 160 mil thick corrugated plastic. Compared to the lightweight FloorBoss Signs, these are much sturdier and ideal for outdoors. You can also try our sign and post kit which comes with a heavy-duty 23.5 lbs cast iron base with 14 inches diameter and 4 feet tall post.