Blade Kit Hardware with Echo SRM Trimmer Blade Hardware/Upper Lower Adapter Plate Kit Fits SRM-225,Fit All SRM Family. Except The High Torque Version,C535000160 ,90051100010 models: 90051100010 ,C535000160,C535000150 ,6103150713 Fit for:with all SRM series. However, it is not suitable for high-torque models. If your model shows a T-letter ending, then this kit is not suitable for you. Please note: Please check the of your gear case assembly on unit and measure your PTO shaft before purchasing. This part is not suitable for the 45mm SRM "T" High Torque Gearbox version with PTO shaft. If your shaft is 32 mm, you need to install short-connected upper fixing plate (y) part! / C535000160 onto PTO shaft. If your shaft is 42 mm install shaft collar (z) part # 61031507130 Then Short-Necked Upper Fixing Plate (y) part # C535000160 Onto PTO shaft. : If you have any questions about our products, please feel to . Blade Kit Hardware with Echo SRM Trimmer Blade Hardware/Upper Lower Adapter Plate Kit Fits SRM-225,Fit All SRM Family. Except The High Torque Version,C535000160 ,90051100010 models: 90051100010 ,C535000160,C535000150 ,6103150713 Fit for:with all SRM series. However, it is not suitable for high-torque models. If your model shows a T-letter ending, then this kit is not suitable for you. Please note: Please check the of your gear case assembly on unit and measure your PTO shaft before purchasing. This part is not suitable for the 45mm SRM "T" High Torque Gearbox version with PTO shaft. If your shaft is 32 mm, you need to install short-connected upper fixing plate (y) part! / C535000160 onto PTO shaft. If your shaft is 42 mm install shaft collar (z) part # 61031507130 Then Short-Necked Upper Fixing Plate (y) part # C535000160 Onto PTO shaft. : If you have any questions about our products, please feel to .