several tractor-style riding mowers manufactured by Husqvarna with a 42" (107 cm) cutting device, such as Craftsman, Husqvarna, HOP, Jonsered, Lazer, McCulloch, Partner, Poulan, Rally, Wizard, etc. in models (PNC); 964777800, 964777000, 960410343, 960160024, 960160012, 954130062, 964-77-78-00, 964-77-70-00, 917.288031, 917.277520
2 × 13-114 => 42” (107 cm), 2 pcs needed / cutting device (length 53.6 cm, center hole 5-part star)
(the original numbers appear in Husqvarna's Exploded Pictures for both the standard blade and the Bio blade, compare the images of the blades of products 13-114 and 13-118 with the blade on the old machine to order the blades you want)