Sonic Grease Single Use Packet *4-PackMopeka Sonic Grease is applied to the sensor face to improve ultrasonic performance. This is a 4-pack of 1cc single-use units.Note: All sensors are shipped with 1 grease pack. Order this package for use when sensors must be removed from the tank frequently, or when grease has otherwise been removed from the sensor. table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Truck Freight: No Oversized: No