Designed these to add some shock absorption to my longboard with TPU risers and reduce the teeth-rattling feeling I had going over cobblestones. These fit standard drop-through trucks and match the hole pattern for mounting. They're 2mm tall which allowed me to fit them without getting longer screws for the truck mounts, use the scale z command if you'd like them thicker/thinner.
These were printed with Ninjaflex Semiflex on Ultimaker 2+ with 100% infill. Designed in Fusion 360, feel free to download and edit: http://a360.co/2AewbDs