Fiend Skate Supply Says:
-All pucks made of premium oil infused material to glide consistently over any surface
-Beveled to reduce catching on cracks and holes
-Quality Velcro to ensure the adhesion aswell as hook and loop don't fail
- Diameter of pucks are 3.25 inch with various thickness offerings
-Price is for a pair of two pucks
Boulders are 1" thick
Pebbles are 5/8" thick