This new improved design is available on x300 series and x500 series garden tractors.these deep flat top cutting decks offer an improved air flow of between 20 – 25% compared with the previous design. The deep 11.4cm deck shell is manufactured from a single piece of pressed steel and has eliminated edges or corners where grass build up can reduce the mowing performance.the accel deep™ cutter decks are available in 42, 48 and 54 inch cutting widths.the accel 42a has a 42 inch 107cm cutting width and features adjustable anti scalp wheels to help the deck ‘float’ over the lawn surface. Manufactured from 12 gauge steel this deck is 16% heavier than the previous 42” edge deck. The accel decks can only be fitted to compatible 2016 onward john deere garden tractors and cannot be retro fitted to any pre 2016 models.