AMFOR EDUF 4 inch diameter fiberglass wrapped element with twointegral anti-telescoping devices (one each end) and one u-cup sealon paint inlet. Such as EDUF-4026, EDUF-4040, EDUF-4640, EDUF-5640are our standard product. Also, we have 6 inch diameter full fitelement, such as EDUF-5640.EDUF-7640