Amazon.com: Keen Ramps - Skateboard Grind Box - 4ft or 6ft Long - Skate Grind Box for Skateboards, BMX Bikes, Scooters, & Roller Blades - Professional Skateboarding Ramps for Home - Made
Custom 6 Foot Grind Box for Sale | OC Ramps
Building a Grind Box for Skateboarding or BMX
Grind Box – 4 Foot | OC Ramps
HOW TO MAKE A CHEAP DIY SKATEBOARD GRIND BOX *EASY* - YouTube