Honeywell 1/2"X1/2" Direct Hot Ignition Smartvalve W/ Fast-Slow 35" Wc1/2" NPT x 1/2" NPT Direct Hot Surface Ignition SmartValve Control with fast-slow opening and 3.5" wc pressure regulator setting. Product Specifications BRANDHoneywell INLET SIZE INCHES1/2 OUTLET SIZE INCHES1/2 FUEL TYPENatural Gas OPENING TYPEFast-Slow DESCRIPTIONDirect Hot Surface Ignition SmartValve Control TYPEStraight-Through LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERSV9520H8513