The Fisher & Paykel SleepStyle Elbow Adaptor is a CPAP accessory designed for SleepStyle machines. It connects the AirSpiral heated breathing tube securely to the CPAP machine for a leak-free connection. Note that it's compatible only with Fisher & Paykel SleepStyle CPAP machines, not other models. The adaptor comes with the elbow pre-attached, simplifying the connection process. To buy the adaptor, check online CPAP retailers and accessories stores that offer Fisher & Paykel products. Ensure you choose the correct adaptor for your SleepStyle machine model. Use the provided search results for more information and purchase options.