These codes are frequently used for vehicle maintenance and interior protection. WeatherTech Floor Liners (447021) Go to product viewer dialog for this item. : These are Front DigitalFit FloorLiners
The numbers and 447021 appear to be distinct product or identification codes that are not typically paired together in a single official manual. 455702_447021
Which (car part, bathtub, industrial gear) are you working with? What is the brand name on the packaging? These codes are frequently used for vehicle maintenance