Anti Slip Seatpost Collar Insert for 41mm Meroca Seatpost Collar

This is only the 3D printed insert

The Meroca Seatpost collar can be found here.

This is printed in 72D TPU with 100% infill. It might also work with a softer TPU but might need to make the clamp tighter which can affect how easy it is to slide up and down. A hard plastic like PETG might work but will require bending the aluminium collar outwards to get the insert to fit initially. 

If you have your own 3D printer, the file is available here on Makerworld.