The 40" NPdrums Concert Bass Drums® stand out for their innovative free suspension system, wooden hull finished in mahogany with 45º edges for greater sound projection, manufactured with a 3" air outlet that allows you to breathe and offer an excellent response and sound projection. The circle-shaped clamping system is held in place by a rubber band that reduces unwanted vibrations. Swivel wheels and locking for easy transport with a 360° swivel side height adjustment system. NPdrums® is a prestigious Spanish brand leader in the manufacture of orchestral percussion musical instruments. Their products are appreciated as soloists, amaters and orchestras, offering a wide catalog of percussion accessory products.EAN13 8435288104553