These attachments are compatible ONLY with E-Collar Technologies products and will not work with other brands.
From the manufacturer:
Ultra Wing Comfort Pad
Titanium wings Brass points.
2 wings with a more aggressive design to reach the skin on dogs with long, thick dense fur.
Developed for dogs with double coated fur. Not meant for dogs with single coated fur.
Best if used by breeds with fur similar to a: Akita, GSD, Husky, Labrador Retrievers, Chow Chow, Samoyed, Bernese Mountain Dog, etc.
Compatible with the RX-050 and the RX-070
THIS IS A NON-RETURNABLE PRODUCT
Manufacturer's warranty info can be found here: https://www.ecollar.com/pages/warranty-returns-and-cancellation