These tubes fit the logic and clock tabs of the DigiComp I plastic computer. They're used to program it.
I printed with white PLA.
Note that the clock and logic tabs on the DigiComp I flip-flops appear to be a little non-uniform in size, and my replacement logic and clock tubes are not as compliant as the original thick-wall plastic "straws" on the original. This means you may have to fiddle with them a bit, and pick the best-fit tube for a tab when programming.
The horizontal logic tube is designed to be printed laying down without support.
The wire jig is for bending more clock rods and logic rods, a crank, and the vertical pin that holds the whole machine together.
The slider is for printing spares of the sliders that run across the top of the machine. It's a simple single slider - not the double “OR” slider.
The author marked this model as their own original creation.