This is the Truvativ Pressfit 30 To 68/73Mm English Thread Bottom Bracket Adapter. This adapter will change a Pressfit 30 bottom bracket frame to accept an English threaded bottom bracket like GXP or Hollowtech II.
Frame Interface: PF30
Spindle Interface: N/A (BSA/English Thread)
Bottom Bracket Shell ID: PF41
Shell Compatibility: 68mm, 73mm, PF30