Unusable.
Shipment was prompt and gasspringsshop went to the trouble of assembling the specified spring ends before shipment. The hardware all looks well manufactured and handled.
However, the springs were unusable due to being WAY out of specification (about 20% understrength at standard conditions).
They came with a sticker stating "1350 N" on them, which was what was ordered, and the sticker also had the PO number on it, but there was no part number or unit serialization on the individual spring I could find, so I have no idea how they keep their inventory from getting mixed up.
Apparently, the inventory did get mixed up, or they are manufacturing to order and there is a failure of Quality Control? The two pistons measured 1,130 N and 1,090 N at 2.5 cm compression at 20C. This is way too light for my application, for which I required the as-ordered 1350 N.
I appreciate the degree of specification gasspringsshop.com offers, but it is an unfortunate waste of time if they cannot deliver the items as ordered.
Also, I would have been happy to have tried to clear this up over the phone, but no phone number is available on the website. Email didn't receive a response within 24 hours, as advertised, so I am leaving this review, which I will be happy to update if that becomes relevant.