Looks barely used something inside a gasket or the cylinder may be stuck. Just leaks air when connected out the exhaust. Unbranded matches CP one. Made in Taiwan.\\ ***** If you find a better price elsewhere for the same item in same condition (new,new,used,used,open box open bo etc.,) send me a screenshot and I will beat that price. 100% Guaranteed I will work with you to get you the best price on that product. I do ask that YOU DO NOT send me price matches of fake or counterfeit items, sold items that aren't listed currently, etc., etc., use common sense. if I can buy what I am selling for less elsewhere and it is a reputable seller I will work with you to beat their price and make it fair for both of us. ***** Thanks for your attention to this matter :)