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There are two types. One is the rebreather head to loop connection, the other is the loop to BOV/DSV connection. If yours are the loop to DSV connection, the above 90° will likely fit. They are not compatible with the head to loop connection side. Do you want to measure your coupler external dimension to verify?I have the bulkhead fittings for these with straight couplers. do you know if these would work and/or how to tell if they are compatible.