Currently we only make a 4" sock. We might make a 7" version in the future, but this will require new tooling and a lot of time. For a short term solution we created an adapter for our 4” filters. It obviously wouldn't provide the capacity of the 7", but it would provide an option for systems with lighter bio loads. We are testing the prototypes now. Let me know if you have any other questions.Will these be avaible for 7 inch ?