Guys, this is another front collars Wilton makes. it fits the older generation thru today all the 4" 4 1/2" bullets, and C1. The ID is 1 3/8" and if you have a older bullet 1940's, check with me first that's all you need to know, and the distance between screws is 2" and the OD is 2. 1/2" The thrust washer will come with it and is only used on models after 1998.  Any questions, please ask me. Shipping will be USPS Flat Rate. Thanks for looking.