Crafted with advanced transfer this high-grade, Film technology brake block ensures reduced stopping distances and extended lining durability Featuring advanced drum technology and this product, Noise-reducing brakes stands out in Highly appropriate, Its category for for those prioritizing safety and affordability Eco-friendly fleets. This premium material is perfectly designed for low-floor transit buses. Key characteristics include a specific gravity of 2. 55 and a Gogan hardness of 50 SAE Test specifications for the j661 chase gf dynamometer include an axle capacity of 29, 000 lbs and a brake dimension of 16. 5 x 8. 63, With an al factor of 30 x 6. 5 circumference of 18. 7 inches