I Would like to put tandem on my door

Hello. We do offer the 81-181 tandem roller that uses 1-1/2" wheels. Compare the height of your assembly to ours along with the width. Get back to us and let us know if your part is compatible with the part we recommended

Going by your original discussion that you have 81-004 roller assembly, the 81-181 stainless steel roller should fit in your door. The housing might be loose, because the height is a little shorter and it doesn't have the 13-16" side flares. Stainless steel does make the roller assembly ideal for applications near moisture especially salt water and wear should be better. See our return policy here.