Comments about Aqua Aqua DIN Valve Cap Protector:
They did initially fit over my DIN valves but split after about 3 weeks. I'm getting Delrin bolts to replace these on all my tanks.
Comments about Aqua Aqua DIN Valve Cap Protector:
It does fit my 300-bar DIN valves (which, I believe, are as big as they come). It's a tight squeeze, and doesn't seem like it fits at first, but it eventually goes on and fits pretty well. Definitely a good buy for the low price.
Comments about Aqua Aqua DIN Valve Cap Protector:
Too small to fit any of my DIN valves.