I had a model 1R1011LPC cushion. The rubber on the valve was cracked and would not hold air. It was no longer under warrantee as we have had it over 5 years. My father, a 95 year old Pearl Harbor Survivor, really needed it in his wheelchair! Silvia of 1800 wheelchair.com assured me that I needed a part and would not need to replace the entire expensive cushion. It is wonderful to have a business use honesty and integrity instead of "seeing dollar signs". I am writing this review BEFORE shipping and quality checks, but I am assuming it will be as great as the service. I highly recommend this business.