Check the listing for details. Custom Hawley Spring Retainer and Aligner, Removable, At-Home Dental. Condition: New. Listed at 299.95 USD. Professional at-home kit includes impression and custom Z Spring Hawley Retainer.The process is simple.Step 1) We ship you an at-home impression kit with instructions. Step 2) You return the impression in a prepaid box via the US Postal Service. Step 3) We fabricate the Z Spring Hawley Retainer and ship it back to you.Manufactured in the USA. Includes hassle-free replacement impression kit if you don’t get it right the first time. Simply contact us… “I need another impression kit.” Z SPRING HAWLEY RETAINER:• Straighten your front teeth.• Custom made by hand specifically for youHOW THE APPLIANCE WORKS FOR YOU:The z spring can be adjusted to straighten your front teethWHAT IS THE Z SPRING HAWLEY RETAINER MADE FROM: Acrylic and Stainless SteelWHAT IT DOES FOR YOU:Straightens your front teeth. Enjoy your new smile!