Overview Reviews Product Description FKL: Product Videos Custom Field Inner diameter [d] 20 mm Outer diameter [D] 47 mm Inner ring width [B] 25 mm Outer ring width [C] 24 mm Product Reviews Write a Review Write a Review × Z&S Track rollers NUTR 20 [Z&S] Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *