[en] The design concept of the small-angle neutron scattering instrument was due mainly to Caciuffo (Caciuffo et al 1986), an IAEA expert assigned for this purpose in 1985. The original design has since undergone numerous changes, taking into consideration practicable implementation and budget constraints. This paper describes the instrument design starting from the original concept to the final configuration. The mechanical layout is discussed together with a brief description of the data acquisition system available. The current progress of instrument construction is described. Finally, a brief account of possible instrument use is given