The EZ-FLO EZK-RVFG is a 10-32 Thread Venturi Fitting. The EZ-FLO lets you release an exact amount of nutrients into the soil, no matter the soil or landscape conditions. Since the fertilizer is in the actual water, nutrition travels further and deeper, and reaches more of the roots. The more the roots absorb, the better your landscape looks. It is a genuine EZ-FLO product.