THE 13" LONG NEEDLE IS FABRICATED FROM 3/8" SCHEDULE 80 STAINLESS STEEL PIPE WITH 1-1/2 INCHED OF SOLID STAINLESS STEEL TIP WELDED ON.  THE DISCHARGE HOLES ARE ON THE SIDE OF THE NEEDLE FOR LESS CLOGGING.    4-HOLE NEEDLE FOR HIGHER VOLUME FERTILIZER  INJECTIONS CAN BE DRILLED OUT TO INCREASE OUTPUT