New Dacor 1st Stage High Pressure Seat for Extreme Scuba Diving Regulator with Dacor's Isometric Exploded View Drawing Upgrade Your 1st Stage Regulator with a New High Pressure Seat! A copy of Dacor's isometric exploded view drawing from the Dacor Service Manual is included which shows all the regulator parts and part numbers The photo of the high pressure seat is for "Illustrative Reference Only" and does not necessarily represent the exact seat of this particular Regulator