https://www.ebay.com/sch/i.html?_nkw=3M+777F+Cloth+Belt+777F+37+In+X+75+In+36+Yf+Weight&_sacat=0&_dmd=2

3M (777F) Cloth Belt 777F, 37 In X 75 In 36 Yf-Weight

Regular price
$419.00
Sale price
$301.00

3M Cubitron coated 777F sanding belt uses ceramic as the abrasive material. 3M incorporates this ceramic material into the sanding belt forming a grit of 36. This particular 3M sanding belt is 37 in wide by 75 in long. This product is on a cloth backing, YF weight.