These are my initial designs for the peristaltic pump that I have drawn on Solidworks.

I will be using bearings instead of rollers to squeeze the tubing as shown below.

The pump consists of two rotors to hold the bearings in place. The bottom rotor has extrusions as shown below. The extrusions have diameters equal to the bearings's inner diameters to set it in place.

The bottom rotor has holes instead of extrusion to allow the bottom extrusions to pass through and to be glued onto the surface of the hole.

Next I will work on manufacturing and assembling the parts together so I can then begin testing the pump.