Go to Steele Rubber products. Most of the seals slide into a channel and are not usually screwed in. Try and look at an end of the seals and match that profile to what is available. Good chance your unit does not have seals that were made for only your trailer.
2020 Keystone Cougar 22RBS, Ram 1500, two Jacks and plenty of time to roam!
The difference between genius and stupidity is that genius has its limits. A.E.
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