Blade Width – 2.50. Blade Thickness – 0.250. Blade Length – 16-1/4. Center Hole Size – 5/8. Air Lift – 1. You can count on the OregonĀ® 91-183 replacement lawn mower blade to be the best in the industry. It delivers a clean cut for quality results. Requires 3 blades for 48″ cut and 2 blades for 32″ cut. Durable and increased life. Major brand replacement: Exmark. Fits the Following Models. 5900030, 5900215, 5900556, 5900557, 5900605, 5900606, 5900607, 5900614, 5900615, 5900616, 5900646, 5900647, 5900710, 5900711, 5900712, 5900739, 5900759, 5900779, 5900806, 5900834, 5900877, 5900878, 5900893, 5900905, 5900978, 5900991, 5900992, 5901000, 5901000.1, 5901002, 5901002.1, 5901004, 5901005, 5901012, 5901014, 5901015, 5901019, 5901020, 5901040, 5901041, 5901042, 5901043, 5901044, 5901045, 5901046, 5901047, 5901050, 5901050.1, 5901051, 5901051.1. 5901194, 5901270, BD48KA, BG1418B, BG48KA, BGF52K, G1818-6, G1820-6, H1618B, H1818B, H1820B, HW32KA, HW36B, HW36K, HW48B, HW48KAR, PCM4818K, PCM6120O, PCT4818B, PCT6118B, PCT6118K, PCW4812K, PCW6114K. Replaces the Following Blades. 1520843, 1520843S, 20843, 20843S, 5020843, 5020843S, 5020843X2, 5020843XS, 5101986, 5101986S, 5103303S, 5103303X2. 00273000, 04919100, 04920600, 273000, 4919100, 4920600, 715026. 100340, 101366, 539100340, 539101366, 539106040, 539106041, 539109756. 5101986, 5101986BM, 5101986BMYP, 5101986S, 5101986SYP, 5101986YP, 5103303S, 5103303SX2, 5103303SYP, 7014036BMI, 7014036BMYP, 7014036YP, 7017036BM, 7017036BMI, 7076675, 7077377, 76675.