The rack stand have many models and difference load capacity. DF13 is 10U rack stand, load capacity are 60kgs, DF140 is 12U rack stand, load 60kgs too,DF129 it can suitable many kinds of stand, load capacity are 150kgs, JG35U is 19" rack stand. DF129, Multi-function stands carrier, 10 stands around each time. Easy to load. Suit for music stands, guitar stands, microphone stands, keyboard stands and etc. Can be applied for performance in grand theater or many other occasions.