New Zealand company Steel and Tube is facing 29 charges of making false and misleading claims about its steel mesh products.
The Commerce Commission has laid the charges under the Fair Trading Act in the Auckland District Court.
The commission alleges the company made "misleading representations" on their batch tags, batch test certificates, advertising collateral and website that the SE62 product was 500E grade steel when it wasn't.
The 500E product is a ductile steel mesh often used in concrete slabs like house foundations slabs and driveways.
The commission also claims the company said the SE62 product had been independently tested and certified when it hadn't been.
"This included using the logo of an independent testing laboratory on SE62 test certificates when the product had not been tested by the laboratory."
Steel and Tube is the latest company to face charges this year, with Timber King Limited and NZ Steel Distributor Limited also facing the court over misleading claims to do with 500E mesh.
Those companies have already entered guilty pleas.
There could also be more charges pending for at least one other company, while investigations are ongoing into an additional business.
The commission started its investigation in August 2015 after a complaint about the validity of claims by three companies selling steel mesh.