Check the listing for details. 10" dia. Automatic (pneumatic) Industrial Grade Blast Gate. Condition: New. Listed at 700.00 USD. Our air-operated gates are fully automatic using an air cylinder that has power in both directions. Instant open/close. 35 lb. load capacity at 80/90 psi., 1/4 in. NPT ports. No lubrication required, air cylinder is standard. This listing includes (1) air cylinder as shown in photo. Dual Cylinder Option for a more compact installation is available at an additional cost. Dual cylinders mount on each side of the duct opening rather than on the end making the overall length shorter. Listing also includes (1) 120V solenoid (other voltages available upon request). Unit wil ship with 120V solenoid (unless otherwise specified) for interlink to your machinery or auxilary switch. Alternately we can provide a 24V solenoid if specified with order.