Bike Suspension

these parts help make the back seat of your bike into a suspension. you just insert the bottom cap witch is made with pla with 30 infill and put it in the bottom of the tube your bike seat sits in then put the bike bottom suspension p3 in the tube( printed with tpu with 60% infill) Then put the bike suspension top into the tube( printed with tpu with 50% infill). then put the seat back on. and if you don't like the seat twisting just add some guide wires going form the bottom of the seat to the back of the bike.