Tianjin songlin musical instruments co. Ltd Dear sirs, We are a manufacturer from Tianjin China in producing kinds of double bass stands. They can be adjustable smoothly according to your double bass. They can support your double bass safely and steadily. High quality and also at the competitive prices. Should any of them be of interest to you, please let us know at your earliest convenience. Hope we enter into a long-term business relationship with you on mutual benefit. Looking forward to your kind and soonest reply.