i purchased the 6x6 and 8x7 concert toms and both of the instruments had defective drum hoops. not what someone would expect from tama products. after explaining with photos and email to customer service why they are defective hoops and that the result is a drum that constantly de- tunes. their answer was '' no fault found'' sadly ,thoman's team of specialist and accounting departments do not want to deal with this issue . and will waste your time. , so i had to purchase new hoops for these drums . dixon 1.6 mm well made and straight quality product.