✓【Compatible Models】Designed for 48 inch lawn mower decks, compatible with YTH2348, GTH2548, YTH2148, YTKH1848XP, PB20VA48, DB24H48YT, DB27H48YT, PBGT22H48, CO24H48STA, COGT22H48A, PD20PH48STA, PD20PH48STB, PD20PH48STC, PD22PH48STA, 917.279100, 917.279200, 917.279201, 917.289560, 917.289570,917.289571; Compatible with States man SO21H48YT, SOGT22H48 mowers, ensures accurate compatibility and seamless integration with your existing equipment
✓【Replacement Part Numbers】Direct replacement for multiple O EM part numbers including 173920, 173921, 180054, 532173920, 532173921, 532180054, 539107519, 575938201, 575938301, 577146201, 512258301, 917173920, 917532173920, 917532173921, 917532180054, 917539107519, 917577203106, 954633774, 954633781
✓【Mulching Performance】Serrated edges enhance grass clippings decomposition, returns nutrients to soil for healthier lawn, sharp precision ground edges provide clean consistent cuts with minimal effort
✓【Durable Construction】Heavy duty steel construction resists bending and breaking, maintains sharpness longer than standard blades, withstands frequent use in various lawn conditions
✓【Precision Engineered】 Each 173921 blade measures 16-5/8" in length, 2-1/2" in width, 0.2" in thickness, and 5-point star center hole. Confirm these dimensions match your original blade for optimal performance and safety