MAKO rebar support chairs are made in the USA and DOT approved. They can be used for at grade or precast applications to support #3 through #5 rebar or post-tension cable. Features: Time-saving: Rod simply snaps into the chair, which eliminates the need for tying Non-conductive: Our non-conductive concrete chairs are versatile and ideal for all types of projects, especially bridge decks and power plants. Wide base: Flat and wide bottom allows the chair to stand securely and prevents it from puncturing the vapor barrier under slabs Lightweight: Durable yet lightweight polypropylene construction lends easier handling and keeps the workers moving faster Compatibility: Works with #3 through #6 rebar or post-tension cable Package includes: 800 x Rebar chairsMade in the USA