Natural bristle brushes for cleaning and preparing surfaces for buffing and polishing for use with polishing compounds with– chungking for stiff, horsehair for firm, and goat hair for soft bristles are evenly held with steel rings. Felt and cotton buffs are for buffing and polishing with compounds on hard and soft metals, metal plate, precious metals, plastics, wood, acrylic, and painted surfaces. Wheels, Stars and Felt Buff are 22 mm (.866″) diameter. End Brushes are 4.8 x 9.5 mm (.472″ x .188″) Includes: Brown/White Bristle Mix, 3-layer Cotton String Buff 25 mm (.984″), & 3-layer Felt Buff White Goat Hair Brushes: Wheel, Star, and End Brush Black Chungking Brushes: Wheel, Star, and End Brush White Horse Hair Brushes: Wheel, Star, and End BrushCheck Out The Foredom Tools Catalog SKU: FOR-AK51377 UPC: 098666082157 Brand: Foredom MPN: AK51377 Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.B068H