Stainless steel adjustable rings. The metal of these rings is very sturdy which is why they are pre-adjusted to popular ring sizes. Feel free to adjust them at home if it is not your size. Listed as US ring sizes. Prevent rings from being smashed against surfaces or under heavy pressure, polymer clay can break under these circumstances.
Polymer clay is waterproof, but brass and stainless steel findings can tarnish if exposed to water. Make sure you remove them before any water activities and before sleeping. When cured properly, polymer clay is "flexible", but please do not bend or treat negligently. If it is sealed with varnish or contains acrylic paint, please keep away from harsh chemicals that can dissolve these, such as acetone. Store in a cool dry place. If you want to clean polymer clay, gently wipe them with a damp cloth. To clean brass, remove it from your accessory and dip it in ketchup for 10 minutes to remove tarnish, or mix vinegar and baking powder to rub it and rinse.