Testo CO Cal Gas Bottle (500ppm) Testo CO Cal Gas Bottle (500ppm) 170 liter bottle. 2000 psi. Disposable. Call us for a quote SKU: 400554 9010 Category: Calibration Kits Tag: Calibration Kits Description Description Testo CO Cal Gas Bottle (500ppm) 170 liter bottle. 2000 psi. Disposable. Related products QRAE Plus Cradle Kit0 out of 5 $662.00 Add to cart QRAE Starter Kit (1 Controller 1 MultiRAE Plus/QRAE cradle 4-gas mix regulators etc.)0 out of 5 $2,823.00 Add to cart Nitrogen (N2) 34L Cylinder Cal Gas and Regulator Kit0 out of 5 $324.00 Add to cart