Grind Box - 12″ high x 16″ wide x 4′ long – SB Skate Ramps
Grind ledge / Grind box (6ft long) – roll-in.co
HOW TO MAKE A CHEAP D.I.Y SKATEBOARD GRIND BOX 2.0 - YouTube
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
DIY-Grind-Box-For-Skateboarding | Skate The States