... mouth ,6″flange SpecificationΦ200-Φ800 for the hollow to the PE liner,Φ900 above for PE rotational molding lining,Can also ... water filter, RO and UF membrane housing, RO system, Accessories (valve, distributor, tank head, etc.),OEM service and lable service offered ... quality products and try our utmost to satisfy our customer .For more details, please contact me directly.