Starting from material selection to final production, every step is taken care by highly qualified and experienced professionals . The high-quality steel for its construction is the same than the one used in the naval field, with a thickness greater than 10mm and we als have strict requirements for our welding and painting technologe to meet the interrnational standards. So  the 2200mm diameter steel navigation buoys  can be passed a serial of strict test successfully.  and finally they will be effected the voyage. so welcome you get in touch with ZAZ to get more information about our steel navigation buoys.