Cat treadmill

Probably the cheapest cat treadmill! The total cost is less than 80 yuan(in my country)!(The content is translated by AI, please ignore grammatical errors and miswording)Materials Required:Two galvanized flange rings with a diameter of one meter One kilogram of PETG filamentA 1.5 cm x 60 cm x 30 cm wooden boardFour 1.2-inch U-shaped nylon pulleysFour-hole Corner Connector, size 46mm*30mm, 8 pieces of 0.8mm or 4 pieces of 1.2mmA piece of carpet of 1.2 meters * 1 meterA non-toxic superglue16 M6 screwsSome filament cartons that you didn&#39;t throw away<span style="background-color: r