Introducing the 4 in. Dual End Blast Gate by POWERTEC. This blast gate maximizes the efficiency of your dust collection system. It is designed to give you optimal control over the airflow by connecting to your 4 in. hoses to your shop tools and machines Helping you to rid them of dust, chips and debris. To do so, it comes equipped with dual ends that offer both, a Left Hand threaded and tapered push-on design that accommodates a 4 in. OD dust port flange. //Features// A left sided, easy sliding gate that delivers seamless movement. Built-In stop to prevent the sliding gate from abandoning the housing. Threaded and Tapered Ends for dust hoses and dust collection port flanges. //Premium Quality// The dust collection quick connect fitting is made with high quality, black ABS plastic. The smooth interior was designed to maximize airflow once connected. This thermoplastic polymer material possesses strong impact resistance, high tensile strength, along with abrasive scratch and corrosion resistance.