The ProVac is available in three sizes to suit most aquarium depths, and features a priming bulb handle – so your hands stay dry and out of the aquarium.The ProVac makes aquarium maintenance easy for you – and great for your fish!Features & Benefits:4.5° outletIn line priming bulbGravel filterHelps to prevent the hose from kinkingMakes starting easyPrevents gravel escaping into the bucket..