Zimo Professional 21" Acoustic Soprano Ukulele Musical Instrument Black &hellip; Size: 21 inches / 7-15 Days Delivery(Tracking number)/ FREE Bag Ukulele back made of maple wood. Front panel made of basswood. The Ukulele is in loose state before it is sent to protect it from demge. Even if it is adjust, it is no use because it will be in wrong tone after transmission. Then you have to tune up it. Besides, the string elasticity is not reach saturation and you need tune up it repeatedly, which does not belong to product problem.