Quote:
Originally Posted by synolimit
Z1 doesn't have steel wire inside to keep the shape so under WOT the tube doesn't collapse. I don't think it's a issue because it's really thick silicone. HPS I believe does have the steel wire. Only difference I know of.
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I assume you meant to say the Z1 DOES have steel wire inside. Their description on their website says it does, so I would think these are the same as the HPS...