This 4" diameter, 40 ply, 3 rows stitched, Yellow Muslin Buff has been chemically treated which increases its thickness for better surface area coverage. Excellent for cutting with tripoli when used on soft metals.  Can be used for cutting or polishing when used on harder metals, like platinum, palladium, steel and stainless steel. Lasts up to three times longer than untreated white buffs. Made of fine-weave muslin with combed edges. Highest quality thread count: 86/80. Made in USA.