Keep the windows on your classic Ford or Mercury moving smoothly with this 40-piece window regulator roller assembly kit. Designed as a direct replacement for Ford part number C0AB-6423240-B, these rollers help restore proper operation to aging window regulators that have worn, cracked, or missing components. This kit includes 40 window regulator rollers, giving you plenty of pieces for multiple doors, multiple vehicles, or to keep extras on the shelf for future repairs. It's a smart choice for restoration shops, DIY classic car owners, and anyone maintaining a small fleet of vintage Fords. Each roller is built to work with the original-style window regulator tracks used on many 1960s and 1970s vehicles. Installing fresh rollers can help reduce binding, sticking, and off-track movement, letting the side windows travel up and down more smoothly and consistently. This window regulator roller assembly replaces C0AB-6423240-B and is designed to fit a wide range of classic Ford and Mercury models, including Ford Falcon (1960-1965), Ford Fairlane (1960-1965), Mercury Comet (1960-1965), Ford Mustang (1965-1968), Ford Econoline (1961-1967), Ford Truck (1961-1972), Ford Bronco (1966-1977), and Ford Thunderbird (1961-1966) that use this style of roller. Whether you're finishing a full restoration or simply fixing a stubborn window, this 40-piece roller kit provides a convenient, cost-effective solution to keep your classic's windows working the way they should.