A&I XHT 19-1/2", 15/16", HL Mower Blade (Set of 6) - B1EM1875,6 Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness. (3) blades for 56" cut. Fits Triton decks. Center Hole 15/16" Length 19-1/2" Thickness .197 Type Medium Lift - Notched Width 3" Crossed From: 103-9606 EXMARK 103-9606-S EXMARK 1039606 EXMARK 1039606S EXMARK 109-9606-S EXMARK 1096462S EXMARK 1099606S EXMARK 116-5498-S EXMARK 1165498S EXMARK 12004 ROTARY 355-419 STENS 355419 STENS 492-064 OREGON 492064 OREGON This is an aftermarket product, not an OEM. A physical address must be provided, NO P.O. BOXES. Thanks for looking!