Frequently Asked Questions (FAQs) FAQs for Product: 405 Elbow Kit with Diffuser 900HC441 1. Does this kit include the 'C clamp' that secures the elbow to the mask frame? (Posted: 4th Oct, 2006) Question & Answers for Product: 405 Elbow Kit with Diffuser 900HC441 Q. Does this kit include the 'C clamp' that secures the elbow to the mask frame? (Posted: 4th Oct, 2006) A. There is no C Clamp on this model. The elbow clips into the mask and is held in by "fingers" on the elbow. What make and model of mask do you have? Back to Top Submit A New Question Can't Find The Answer You're Looking For? Submit Your Question Below: Related Product:  405 Elbow Kit with Diffuser 900HC441 Your Question:  (Please enter One Question Only! You can ask as many questions as you like, but do not combine them into one post!) Your Reply Email Address:  Security Step:  Enter the text to the Left in the space below: [ CLOSE WINDOW ]