The new type of deck is the XRD DECK this is the reinforced version of the popular IBS deck which stands for iteractive blade system,what this means is the front blade and the one to the left turn one way, the one at the other side goes in the opposite direction thus feeding the grass to the centre ready for the powered grass collector to pick up. The new XRD deck has a solid steel band around it plus the design of the deck wheels are held between to lugs so as not to be bent about as they were on the later IBS decks.This deck will cut as low as a cylinder mower but if driven steadily will cut grass as high as the top of the bonnet of the tractor.If very long grass is being cut it is best to unhitch the powered grass collector and just leave the grass on the ground and then cut it in the opposite direction after a few times being cut the grass just disappears, obviously this is best done in very dry and windy weather. There are 5 sizes of I.B.S.decks 36",38",42"and 48"for the C series and 50" for the A and K.