These replacement 10mm barrel roller skate 88A cushions are designed to be used with the Bont Slide Blocks for the Bont Prodigy, and Tracer plates. The cushions are made with extremely high-end urethane with 88A hardnesses. 

Specifications: 

• Colors: Black
• Hardness: 88A 
• Bottom Barrel dimensions: 10mm (H) x 25.4mm (Diameter)
• King Pin Hole diameter: 9.5mm