Amazon.com: OC Ramps 4 ft Grind Box - Durable Skate Boxes for Grinding - Wood Skateboarding Obstacle with Metal Rail - Great for BMX, Scooters, Snowboarding and Inline Skaters as Well : Sports & Outdoors
I built a skateboard grind box : r/DIY
Building a Grind Box for Skateboarding or BMX
Built a box today. 6ft long, 3ft wide, 1ft high. : r/skateboarding