This is a miniature version of sash chain. It is not sash chain as it is not strong enough to support a window. It is more the appropriate size for a keychain.
Offered below in solid brass, stainless steel or nickel plated steel.
Links per foot: 60.
Approximate width: 1/8".
Approximate thickness: 1/8".
Approximate length of each link: 1/4".