Due back in stock soon.The revolutionary ECHO Speed-Feed 400 takes the hassle out of refilling your trimmer head, and is the easiest tap-to-advance head available on the market today. The unique design allows you to reload in under 30 seconds in just 3 easy steps, all without disassembling the head, to save you time and get you back on the job faster. The head is designed with a smooth bottom to easily glide across the ground to deliver an even cut, while the line is easily advanced by tapping the bottom of the head on the ground. ECHO Speed-Feed 400 is built for rugged applications where medium to heavy-duty cutting are required.The universal Speed-Feed Head  is compatible with ECHO SRM trimmers, as well as other brand trimmer models.