Brand: Allstar Performance Manufacturer's Part Number: ALL64512 Part Type: Shock Bump Stops Product Line: Allstar Performance Roller Skate Wheel Shock Bump Stops Automotive Fittings Part Number: AAF-ALL64512 UPC: 848238087482 Bump Stop Thickness: 1.000 in. Bump Stop Hardness: 60 Durometer Bump Stop Color: Purple Quantity: Sold individually. Notes: Bump stop has a 0.625 center hole. Description: Allstar Performance offers a variety of bump stop support options, including roller skate wheel shock bump stops. These donut-shaped suspension components are made of heavy-duty composite material in a range of hardness options (from 50-70 durometer) to give your vehicle a smooth, progressive spring rate. Order the bump stops needed for your vehicle.