Photos of ET-2000 Plus The ET-2000 Plus offers specifiers, installers and users all of these advantages: Only the head has changed, all else remains the same as the ET-2000. Meets or exceeds NCHRP-350, Test Level 3 criteria. Latest innovation to the nation's most advanced guardrail end treatment. Now even easier to install. 'Softer' ridedown for smaller vehicles. Addresses future side-impact testing criteria. ET-Plus head can be used in lieu of the original ET-2000 extruder head on any of the ET-2000 systems previously accepted. ET-2000 Plus Offset 0 to 2' (0 to 610 mm) Length 37'-6" or 50'-0" (11.4 m or 15.2 m) Post Spacing 6'-3" (1905 mm)