... .31mm, 0.38mm, 0.4mmPressure tank cap with different material,color,size,thickness and design according ... quality,best price,serviceSolar pressure inner tank cap with different material,color,size,thickness and design ... heater line product and solar water heater parts supply. The outside cover including all size you need ... .2mm to 0.6mm! We always supply OEM products with customers' logo and styles. :