Specifications: Weight: < .28 oz. (< 8.0 g) Dead Space: < 3 mL Connection Ports: ISO 15 mm I.D. patient end ISO 15 mm O.D. circuit end Color (indication only): Blue when no CO2 present Green when approximately 1-2% CO2 present Green-Yellow when approximately 2-5% CO2 present Yellow when >5% CO2 present