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 . <EOS>