Hose Clamps (not the typical kind)

[Eb0la11]

Hey guys,

just wondering if anyone knows where I can get a hose clamping device for adjusting flow through a rubber tube so as to set up, say, a drip acclimatization?

I have one right now and its basically almost like a bolt that has a side channel where a knob can screw in to pinch the hose. It works wonderfully, but I cant seem to find them anywhere and Id like to get maybe 3 of them?

Anyone know what Im talking about? I looked for a picture but cant find one.