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Specification:Material: T2 lead free copperThickness: 2mmLargest diameter: 350mm
The price of the helmet depends on the largest diameter, the 6 inch and 8 inch helmet both have a 350mm diameter so we sell them at a same price. We can also make custom helmet if you want larger or smaller volume.
We use standard tri clamp ferrules for the helmets, the 6 inch tri clamp ferrule has a 167mm OD flange and 8 inch tri clamp ferrule has a 217.7mm OD flange.
Items in stock typically can be shipped within 7 work days, for returns please email us directly.
We provide one year warranty for all of the items sold in this site excluding gaskets&seals. Warranty period starts on the date of delivery and we will also cover postage for replacements.