20" Natural Poly Blend 5/Cs.Rubberized Binders With A Blend Of Natural Hair And Synthetic Fibers Create A Unique Textured Burnishing Pad. It Contains The Strength Of Synthetic Pad With The Lubricating Effect Of A Hair Pad. Natural Blend Has An Excellent Washability With Anti-Dusting Characteristic. A Great Multipurpose Pad.For Propane Its Recommended To Use At 2000-3000Rpm For A Hard Highly Durable Finish. For Battery Power It Is Recommended To Use At 1500-2000Rpm For A Hard Highly Durable Finish. For Electric It Is Recommended At 1500 Or More Rpm For A Hard Highly Durable Finish.