Carburetor Replaces for 581177001, 579629701, 502845001, 505183101, 521631601, for WYA-44, WYA-56, WYA-64, WYA-64-1, WYA-79, WYA-79-1, WYA-155, WYA-155A, WYA-172, WYA-172-1. Number of Pieces:2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.