Our aim is creating trendy and very unique?sport accessories. We do modifications, testing, trying to find a factory and a design?that could be aesthetic. Our backpack will be ideal from all with renewable durable and extremely strong patterns. We design our products with easy setup and storage. We value for our clients and encourage them with their passion.Features 5/8 in. shaft diameter Heavy-duty rubber with nylon inserts With plastic inserts Specifications Color: Black Material: Rubber Length: 8 in.