The GP-SnP Glass Tube is 3mm "fused Quartz"... one of the thickest glass tanks out there. Glass being glass will break if impacted the right way ~ however, under many circumstances they didn't break with me.
It is also the only glass tank I know which has a 'logo' that has been diffused in it during the manufacturing process... not etched or engraved (if that's possible that is). It thus looks awesome. And as other's have chimed in ~ the filling process on the GP-SnP is the feather in it's cap!



The SnP has a 23mm variant, also with an optional Pro-Ring. Together, they are one of the top 'tank' models you could get for our Provaries.