The Collars sold by A. Wilson Company.
A. Wilson Company is a company in RuneScape that manufactures collars for pets. Their collars can only be found in the Yanille Pet Shop , hanging on a wall. You are unable to purchase any of the collars from the Pet Shop owner.
It is unknown if A. Wilson Company manufactures anything else. A physical manifestation of the company cannot currently be found anywhere in Gielinor.