This Impulse Sealer Replacement Cutting Blade that fits AIE Sealers SMH200C and SMH300C is the real thing. Don't accept cheap imitation impulse sealer blades and risk damaging your 8-inch or 12-inch impulse sealer. Whether you are having to slice 0.5 mil poly or a full-blown heavy-duty 6 mil, the current Impulse Sealer Blade you have on your sealer is bound to get dull. Why replace an entire sealer if you can just make it like new with this 3/8" x 1-1/4" nicely honed blade? While you're at it, why not buy a few sealer blades and save on the shipping and buy the blades in bulk pricing?