These are two brackets which allow the Topping Audio E70 DAC and L70 Headphone Amplifier/Pre-Amp to stack neatly, connecting them into a single unit – the EL70, if you will.
They are designed to have a tight friction fit.
The front piece is a simple band which holds the two units together in two axes. The back piece has a lip which holds them together in all three axes.
I printed mine in black PETG.
The author marked this model as their own original creation.