COR®BON/Glaser® products, has been an American family-owned and operated corporation for over 30 years. Our company uses only the highest quality components and we put our products through rigorous, daily testing to insure that we bring you the safest products available. Our facility has the most modern manufacturing and pressure-testing equipment in the industry. We are proud to put "Made in USA" on all of our boxes, and we stand behind our products 100%. If you are dissatisfied with any of our products for any reason, we will replace your product or refund your money.