The Big Horn 4-Inch Single Threaded Blast Gate quickly, easily and securely connects to y4-Inch hoses and fittings without the need for hose clamps. One end of this innovative device is threaded to ensure both easy installation and an airtight grip; just screw piping onto threaded ports. In addition, this versatile device features a handy sliding gate for simple and effective cleaning action. Lastly, a locking knob ensures that the gate is secured in its optimum position. This convenient accessory helps maintain dust collection system at its peak performing capacity. Maximize efficiency and minimize hassle with the Big Horn 4-Inch Threaded Blast Gate; this essential dust collection accessory comes in handy every time!Unsecured blast gates can be sloppy and tedious to operate. Opening the gate often pulls the hose away from the wall. With its built-in mounting element, the Big Horn wall mounted blast gates take care of everything. Just anchor it directly to the wall for clean and stable operation.Features:One Port is tapered from 3.85" to 4.00" in Outer Diameter 1-1/2" long to provide room to slide on hose and apply a hose clampThe threaded port is perfect to screw in a wire reinforced hose and use a quick clampAllows quick connection of flexible dust collection hose to one end without hose clampsOther side has tapered quick connection/disconnection port with ID of that allows easy connection to dust port flanges with OD of 4"Made from strong 1/8" thick abrasion resistant ABS plastic that will withstand abrasive nature of sawdust and wood chipsInside is smooth to allow maximum airflowBuilt in stop to prevent sliding plate from coming out of housing.