A seal assembly comprising: a seal ring shell including an inside diameter surface and a shoulder portion; and an insert including an upper surface; a bellows connected to the seal ring shell; wherein a portion of the inside diameter surface of the seal ring shell contacts or engages a portion of the upper surface of the insert; a portion of the shoulder portion at an axial end opposite to an axial end where the bellows is connected to the seal ring shell extends radially inward and/or downward from the inside diameter surface and around or over a portion of the insert; so as to impede the movement of the insert in an axial direction relative to the seal ring shell; characterized in that: the insert includes a first tapered portion on one axial end of the upper surface and a second tapered portion on another end of the upper surface; and the seal ring shell includes a first seal ring shell tapered portion configured to contact or operatively engage the first tapered portion, and a second seal ring shell tapered portion configured to contact or operatively engage the second tapered portion, wherein, when measured in cross-sectional side view of the seal assembly, the first seal ring shell tapered portion is smaller than the first tapered portion, and the second seal ring shell tapered portion is smaller than the second tapered portion. a seal ring shell including an inside diameter surface and a shoulder portion; and an insert including an upper surface; a bellows connected to the seal ring shell; wherein a portion of the inside diameter surface of the seal ring shell contacts or engages a portion of the upper surface of the insert; a portion of the shoulder portion at an axial end opposite to an axial end where the bellows is connected to the seal ring shell extends radially inward and/or downward from the inside diameter surface and around or over a portion of the insert; so as to impede the movement of the insert in an axial direction relative to the seal ring shell; characterized in that: the insert includes a first tapered portion on one axial end of the upper surface and a second tapered portion on another end of the upper surface; and the seal ring shell includes a first seal ring shell tapered portion configured to contact or operatively engage the first tapered portion, and a second seal ring shell tapered portion configured to contact or operatively engage the second tapered portion, wherein, when measured in cross-sectional side view of the seal assembly, the first seal ring shell tapered portion is smaller than the first tapered portion, and the second seal ring shell tapered portion is smaller than the second tapered portion. the insert includes a first tapered portion on one axial end of the upper surface and a second tapered portion on another end of the upper surface; and the seal ring shell includes a first seal ring shell tapered portion configured to contact or operatively engage the first tapered portion, and a second seal ring shell tapered portion configured to contact or operatively engage the second tapered portion, wherein, when measured in cross-sectional side view of the seal assembly, the first seal ring shell tapered portion is smaller than the first tapered portion, and the second seal ring shell tapered portion is smaller than the second tapered portion.