This appears to be a product code or part number. It likely refers to a specific item manufactured by Pontet. Here's a breakdown: * **Pontet:** This is the brand or manufacturer. * **OEM:** This stands for "Original Equipment Manufacturer." It indicates that the part is made by the original manufacturer of the product it's intended for. * **55990-04:** This is the primary part number. * **(56284-06):** This is a secondary or alternative part number. Without more context, it's impossible to know exactly what the product is. You would need to contact Pontet or search for this part number online to find out more information.