The Cat BM997406 shim is an authentic OEM component, precisely manufactured to ensure correct spacing and alignment within Caterpillar equipment. With dimensions of 72mm inner diameter, 130mm outer diameter, and 1.5mm thickness, this shim is crucial for maintaining proper tolerances and reducing wear in various applications. It is engineered to meet Caterpillar's stringent quality standards, providing durability and reliable performance for agricultural and construction machinery.