... British Type Forged Scaffolding Internal Joint Pin :Type: Scaffolding Internal Joint Pin Forged Scaffolding Internal Joint Pin Scaffolding coupler Steel ... 22mm, 23mmCertificationISO9001:2000, CE, SGS British Type Forged Scaffolding Internal Joint Pin :1) Material: Q2352) Surface: Zinc Plating, or ... vertical pole,the ledger,the corss braces,the tri-brackets,planks,and the base jacks,all these parts can ...