Material: ABS material, stable performance, cold resistance and oil resistance. The spring is made of high quality stainless steel, with good elasticity and no deformation. Easy Installation: Insert the mower cover into the bottom slot of the mower, press and rotate until the lock locks in place, the installation is complete. Unique Design: Specially designed, the edge has a longer service life on rough surfaces. Aerodynamics reduce duct noise and vibration. Applicable model: Suitable for BLACK+DECKER series, GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7700, CST1000, CST1200, CST2000, MTC220, MTE912, NST2018, NST1118, NST2118, LST220, LST300 LST420 Scope of application: Suitable for terraces, lawns, terraces, gardens, crops, landscaping, landscaping, etc. Note: The data are all manually measured, please allow 1-3cm error due to different light and display, there may be differences in color, please refer to the actual item received.