... several kinds of scaffolding couplers, includes German type, American type, Australian Type, Japanese type, Korean type, British type, and so on. All the produces ... or pressed steel for durability and reliability. 5.hot dip galvanized finish for corrosion resistance. 6.typical working ... parts on the assmbly systems of system scaffoldings .The vertical pole,the ledger,the corss braces,the tri-brackets ...