A-5 Bargard Fits rebars 3/8 to 3/4 diameter, also fits inside 1 ID pipe. A-10 Bargard Fits rebars 3/8 to 1-1/4 diameter, also fits inside 1-3/4 ID pipe. A-20 Bargard Fits rebars 1 to 2-1/4 diameter. BarGard caps are not designed or intended to provide impact or impalement protection. They are not a substitute for covering vertical reinforcing steel with timber, as recommended by OSHA, and are not recommended for use when protection from falls is required. For additional information on acceptable methods of guarding against impact or impalement, consult OSHA CFR TITLE 29, PART 1910, ANSI A 10.9-1983, and your state regulations for specific requirements.