SIZE: 21" long x 2 1/2 wide; 5 point star center hole. 42" AYP commercial mulching style blade for improved mulching performance. Set includes 2 blades. Compatible with Poulan, Husqvarna and Caftsman riders. 2 blade set of heavy duty commercial mulching blade fits many 42" Craftsman, Husqvarna and Poulan mowers. This set replaces OEM #s 134149, 1387971, 138498, 127843, PP240003, AYP7143A79, AYP7158A49, AYP9149A69, DPR20H42STA, TS14H42C, 2P4B9A, 9169A99 and 9178B99. Each blade measures 21" long by 2 1/2" wide with a 5 point star center hole.