The 40" NPdrums Concert Bass Drums stand out for their innovative free suspension system wooden helmet finished in jet with the edges® at 45º for greater sound projection, manufactured with a 3" air outlet that allows breathing and offering an excellent response and sound projection. The circle-shaped fastening system is held by a rubber that reduces unwanted vibrations. Swivel wheels and locking for easy transport with a lateral adjustment system for height with 360º rotation. NPdrums® is a prestigious Spanish brand leader in the manufacture of orchestral percussion musical instruments. Its products are highly appreciated as amaters soloists and orchestras offering a wide catalog of products for soloists and students.