OTTO Excavator Parts Nkr 4Jb1 Diesel Grid Base 5132120750 513212-0750 5-13212075-0 For Isuzu OTTO supplies excavator parts, specifically the diesel grid base compatible with the Isuzu NKR model equipped with the 4Jb1 diesel engine. This diesel grid base has three corresponding part numbers for identification and procurement purposes, which are 5132120750, 513212-0750, and 5-13212075-0.