tach help/advice make waves instrument corporation super pro

i called them and they said send it back and they will replace it with a new one free of charge.I told him that i was not the original purchaser and it had been just sitting around in the package for 6-7 years. he said no questions asked full ten year warranty and we want all our product looking and working good so send it back. I will now be replacing all my gauges with them.