This listing is for a single (1) GM window regulator roller set that fits many different models of passenger cars and trucks from the 50s thru the 70s. This roller has the stud that swivels for angle direction to fit regulator arm and rails as you roll the window up or down and comes with the correct nylon washer, correct rubber isolator washer and the correct NOS threaded nut. The stud thread size is 1/4-20 and is 1/2" in length. The outside diameter of the roller measures 1". The overall width of the roller is 7/16". If you need the steel window nut or the tool to install / remove the nut I have those in my other listings. You will get exactly what is pictured. This roller is a must for a proper restoration. If you need a different style of roller or other hardware for your car please see my other listings or visit my store as I have more like this that are different sizes and styles. You will get exactly what is pictured. Do not go off of the compatibility chart as it may not be correct. Please look at the photos and be sure that the roller you need looks like and measures like the ones listed. The original roller is always very brittle, and often broken or lost when removed. Now you can get your vehicle back to original showroom standards with this new roller. I am a seller of the products I use. This is the same roller that I use on my award winning concourse restorations here at Midwest Muscle Car Specialties so buy with confidence. My parts are shipped fast and are not back ordered like others. If you see it on Ebay for sale than I have it in stock and ready to ship. No back orders or long wait times to receive your order here. If multiple purchases are made I will combine items to save shipping costs. I ship worldwide.