Now what if the drains have only curb inlets? Then simply use the Ultra CurbGuard Insert Style to keep sediment, oil and other floatables and contaminants out! This Ultra CurbGuard Insert Style has special X-Tex filtering material that you can replace quickly and easily. X-Tex works great to allow large sum of water to pass by while blocking and absorbing the liquid hydrocarbon (petroleum and oil). This will significantly help to keep water clean from pollution. In the mean time two heavy duty tension rods keep the CurbGuard secured inside the inlet, allowing a clean, flush-mounted installation.