These aluminum sticks with replaceable nylon sleeves have ergonomically tuned handle diameters. Precision alloy core provides negligible weight and balance variations. Super-hard replaceable polyurethane covers protect both sticks and gear. Vibration-reduction system reduces hand fatigue. Super cool silver sticks really add visual impact to your stage presence. Concert size is slightly longer than studio size. Ergonomically designed handle Precision alloy core Super-hard polyurethane cover Vibration-reduction system Concert Size - 17", .595" diameter Studio Size - 16-5/8" .595", diameter