Sorry, I screwed up. It is 20mm long and 20mm OD. So no, that one isn't the same. Brown of the same dimensions will work too. Yes, the strength is color coded.I guess Green is the strength from what I read on ebay. I'm guessing this one would work? Heavy Load Green Spiral Stamping Compression Die Spring 8x25mm 702105836736 | eBay
20mm OD 20mm Long Heavy Load...