Air systems international completecalibration kit for co monitors, 17 l, for canada, bbk-10 features: 17 liter calibration kit includes 10 ppm co, zero air calibration gas, bbk-r17 regulator, and connect hose in case for use in canada use bbk-20 for u.s. cylinders are disposable carries hazmat shipping fee for use with ba-100, ba-100-6, ba-100-8, ba-50, bb100-co, bb100-co6, bb100-co8, bb100-co, bb100-copm, bb30-co, bb30-cois, bb30-copm, bb50-co, bb50-co4r, bb50-cois, bb50-copm, co2-91lac, co91-14is, co91-14lac, co-91pm, ta3-axaf