ST 1500H OPEN GUN NO VLV Pacific Bay Equipment Sale! from $31.90 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. ST-1500H OPEN GUN Temperature: 300°F 3/8" FPT Inlet x 1/4" FPT Outlet Weight: 20.5 oz.