2.8inch*7.8inch (70*198mm) 62/Zero Hole Made of superior polyurethane (PU) raw material with precision molds. Standard PU Hardness: Soft. Perfect for gentle sanding & polishing work. PU hardness can be customized for different usage. Excellent pad balance makes tools vibration low. Strong, durable and can be stored over 5 years in a dry and air-free room under an appropriate temperature. Multi Options for Pad Back Face: Short-Hook Velcro, Long-Hook Velcro, Vinyl (PSA).