Vogels | EFA8895 Stud Wall Adaptor for EFW8345. The Vogels EFA8895 medium universal stud adapter must me combined with the EFW8345 for use with 16" studs. All Vogels 8000 series wall mounts are single stud mountable. Double stud mounting is already incorporated in the larger flat products, EFW8205, EFW8305 and EFW8405. Through not technically required, a double stud adaptor is available for EFW8245 (EFA8890) and EFW EF8345 (EFA8895).