Quick fits are sold in a 6 piece set, with 2 females size 16.5 and 4 males that are 14.5 in size.and these are made with QUALITY. The female ends go directly on your boom , hooked directly to your hydraulic hoses on your boom. The male adaptors go on your hydraulic thumb and you can leave them on there when you disconnect, because I’m including 2 more male ends that you can put on any other hydraulic attachment made for these machines. Basically elements have to put a hydraulic valve body on each side of your boom for the same result, and saves you money , not having to buy 2 hydraulic valve body’s to put on. They also replace the factory screw in fittings and cap which won’t fit the attachments hoses anyway, because factory ones are sized in correct. These are shown on a (AGT) H12 and will fit many other makes models and brands. These are a CUSTOM made item, and double o-ringed for a nice tight fit and reducing the chance of leaking.. please make sure you do your homework and make sure there the right item for you. No refunds. And check out my other listings, might be something you need. And I’m also doing a complete dismantle on a brand new agtH12 mini excavator, just for parts .