Blazer 1140 Aluminum & Steel Open Base Hurdles feature an open base for safer use. The steel base offer weight and durability while the aluminum uprights are lightweight for quick height adjustment. Features: Open base design for safer use Great for plyometric training also Features a steel base and aluminum uprights 5 height adjustments: 30", 33", 36", 39" 42" Plastic board Stackable base design Meets all NFHS regulations Choose 1 or 2 riser colors at no extra charge Orders of 50 or more hurdles will get FREE board printing and 1/2 freight allowance. Request a discounted quote today! Many people want to know how many hurdles are in a race. In most hurdle races (100m, 110m and 400m) there are 10 hurdles, there are 8 hurdles in 70m, 75m and 80m hurdles, 7 hurdles in 300m hurdles and 5 hurdles in the 200m races.