The Nismo Wristband is not only a fashionable accessory to wear to show your Nissan & Nismo dedication, but can also used as as reservoir tank cover which will help absorb brake master cylinder, clutch and other reservoir tank leaks all while adding a nice Nismo detail to your engine bay. Measures unstretched 3.75" x 4". 100% Genuine Nismo product! Made by Nissan.