1/4” Connections. Condition is pre-owned, but still works perfectally operational and lacks resistance of any sort. Overall, they’re in great condition and both of the connections are devoid of small holes, leaks, dents, or any bad deformities. The manifold moves perfectally and does it’s job. Although, the rubber on the handle possesses slight wear. They’re perfect for attaching 1/4” hose on each end, and will fit well as I’ve never had trouble from my experience with them. When I utilized them previously (which the times were little), I handled them in a respectful manner, nothing chaotic.