Features: Compatible with S9711 S9721 S9111 S9311 S9911 S9731 S9152 S9712 S9321 S9311 S9531 S9031 S9521 S9522 S9000 S9531 S7370 S7000 and RQ12 series. Quick and easy to install, no tools required. Made of high quality ABS material, sturdy and durable to use. Portable and convenient to use. Perfect replacement for the original one. Specification: Material: ABS Color: Orange Package List: 3 x Blade Retaining Ring 1Compatible with S9711 S9721 S9111 S9311 S9911 S9731 S9152 S9712 S9321 S9311 S9531 S9031 S9521 S9522 S9000 S9531 S7370 S7000 and RQ12 series. 2Quick and easy to install, no tools required. 3Made of high quality ABS material, sturdy and durable to use. 4Portable and convenient to use. 5Perfect replacement for the original one.