Mounting Collar for Pro Check Sensor Plastic Holding TankCollar set used with Pro Sensors on flat-bottom, non-magnetic tanks. Includes pre-applied adhesive and prep materials. Note: The collar for flat-bottom tanks differs from the collar for LPG Tanks. The LPG collar is angled where it attaches to the tank to match cylinder curvature, whereas this collar has a flat flange. table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Truck Freight: No Oversized: No