This is for a New in the Box Harmonic Balancer. This came from an Auto Supply Store that went out of business. It is for GM 86-88 passenger cars. (Buick, Olds, Pont.) This is what's on the box: 231/3 8/L V-6 (7" Dia) Serpentine Belt. Other numbers on the box. "Replaces 2622000" 309-406B HB 406B V1020. You can see on the box that this sold for $95 at the store. I know nothing about cars or engines or parts. Selling this as is. Please see pictures