PERFECT FIT REPLACEMENT: Exact replacement for GW-2111, GW-1485, GW-1919, GW-2732, 756-04171, and 88174. Designed specifically for MTD and Troy Bilt horse tillers built since 1989, ensuring your tiller runs backward and forward smoothly WIDE COMPATIBILITY: Compatible with Troy Bilt numerous models including 21AE682L063 (2003), 21A-682J766 (2009), 21A-682P766 (2010-2012), 12055-12059, 12068-12071, 12074-12075, 12080-12083, 12087-12090 series, and more. Ideal for restoring older models EXACT DIMENSIONS: Product size features an Outer Diameter of 3-3/4" and an Inner Center Hole of 3/8". Please check the parameters of your old disc or compare it with our product to ensure a perfect match for your old tiller parts INSTALLATION NOTE: Easy to install to restore your tiller's reverse function. Please note: Do not manipulate the tiller with excessive force during operation, or the reverse disc may be damaged. Proper adjustment after installation ensures optimal performance PREMIUM DURABILITY: Made of high-quality alloy steel and cast iron with a durable rubber coating. Resistant to high temperature and friction, this reverse disc can withstand the high-intensity friction generated by frequent reversal operations for a long service life Compatible models include Troy-Bilt 2308 Iii, 6000-8811 Iii, -OPC (00855639-00864076), -OPC (00864077-00923346), -OPC (00923347-00940749), -OPC (00940750-UP), 21A-682J063 (2002), 21AE682L766 (2004), 21AE682L063 (2002), 21AE686N766 (2004), 21A-682J063 (2003), 21A-682J766 (2005), 21A-683F766 (2005), 21AE686N063 (2003), 21AE682L766 (2005), 21AE683F766 (2005), 21A-682P711 (2013), 21A-682P766 (2013), 21AE683G766 (2005), 21A-682J766 (2004), 21AE682L711 (2013), 21A-682P766 (2014), 21AE682L766 (2014), 21AE682L766 (2013), 21AE686N766 (2005), 21A-682P766 (2015), 21A-682T766 (2015), 21A-682J766 (2008), 21AE682L066 (2008), 21AE682L766 (2008), 21AE682L766 (2015), 21AE682W766 (2015), 21A-682T766 (2020), 21AE682W766 (2020), 21AE682W766 (2017), 21A-682T766 (2018), 21A-682T766 (2016), 21AE682W766 (2016), 21AE682W766 (2018), 21A-682T766 (2019), 21A-683F766 (2006), 21AE682W766 (2019), 21AE683F766 (2006), 21A-683F766 (2007), 21A-682T766 (2017), 21AE683G766 (2007), 21A-682J066 (2008)