We offer replacement wire specially designed for our rebar tying machines. This standard wire is galvanized, 21-gauge wire that is compatible with all BN-branded rebar tying tools, and is certified made-in-USA. 50 Spools per carton 21-Gauge galvanized wire; made-in-USA certified BNT-series rebar tier compatible; all machines The only supported replacement wire for BNT series rebar tying machines