Ethernet plug$119.00 For 6651, 6681 Custom built part numbers are non-returnable Call us for a quote Product Model: 0554 6653 Ethernet plug quantity Add to cart SKU: 0554 6653 Category: Testo Sensors Parts & Accessories Tag: Testo Sensors Parts & Accessories Related products CO Sensor 0-4000 ppm0 out of 5 $176.00 Add to cart RS 232 data transfer cable 5.9 ft / 1.8 m0 out of 5 $104.00 Add to cart SO2 replacement sensor (0-5000 ppm 1 ppm resolution)0 out of 5 $525.00 Add to cart