For added assurance, a final quality sorting and inspection is done manually and random samplings are sent for laboratory analysis to check for microorganisms, moisture control, etc. There are different grades and surface treatments available depending on the type of bottle, bottling methods and wine type. Other sizes available upon request. This treatment improves the cork's mechanical properties. Usually the filling of the pores is performed on lower grades since the top grades are of a quality high enough not to require pore filling.
Colmated corks are a very good functional economic stopper.
Other sizes available upon request. They are obtained by a single molding or by extrusion. Agglomerate cork has high resilience and offers a good seal. Other sizes available upon request. Other sizes available upon request.