4' Long Grind Box by Keen Ramps

4ft Skateboard Grind Box by Keen Ramps The 4ft Skateboard Grind Box by Keen Ramps is a high-quality box made from premium birchwood lumber. This box is designed by skaters and engineered with quality and design in mind. 10" high and 18" wide this box will give you the perfect space to practice your slides, grinds, and more. Upgrade to double-sided coping for even more trick opportunities. For a supreme riding surface, you can upgrade to the fast and super strong Skatelite Pro construction. For more than 25 years, it has outperformed all other ramp surfaces used by the pros and the most intense of sports competitions. Essentially indestructible and weatherproof, the balance, speed, and grip can not be delivered with any other surface.  Keen Ramps is a skater-owned manufacturer of ramps, boxes, rails, and more. After research perfecting the design and construction, Keen Ramps developed into the reputation of producing the most rigid and fine-tuned action sports equipment builder on the