These are 5mm outside dimension jump rings. They are 0.8mm thick so they are perfect for the finest of uses! Made of strong stainless steel plated in titanium alloy.
They are sold all attached to each other. Take them apart one ring at a time as you need them or use it as a chain.
You can also buy them as chain in bulk to use them either way. The chain in bulk is found by clicking here.
Each round link of this chain has an outside diameter of 3mm constucted of 0.6mm wire.