The PC-5 Snap-On Bar Chair is a substantial plastic bar support available to support reinforcing steel in various applications. The Snap-On Paving Chair for #3 to #4 rebar or #4 to #6 rebar (PC-4) is available in heights from 3/4″ to 7″ and the Snap-On Bar Chair for #3 to #7 rebar (PC-5) is available in heights from 3/4″ to 3″.