ITEM NAME:1PCS 304 Stainless Steel Oxygen Sensor Extender Spacer Extension Adapter M JYW Descriptio n Material: 304 stainless steel Color: silver Size: 23 * 18 * 35 mm Packing :1pcs Oxygen Sensor - remove the O2 sensor from the vent and screw the sensor into the extender. Can be easily installed. - then screw the two pieces back into your escape. - the extender has a 7/8 hexagonal head, the same size as the more O2 sensors, making it easier to install, unlike the star side extender. - suitable for most 1/2 inch diameter sensors High quality buy, happy buyï ¼ Oxygen Sensor Extender Spacer Extension Adapter M18X1.5.Oxygen Sensor Extender Spacer Extension Adapter M18X1.5. sensors, making it easier to install, unlike the star side extender. Material: 304 stainless steel. - remove the O2 sensor from the vent and screw the sensor into the.