(NOT normal BB30 which is 42mm). This tough Nylon adapter is designed to be pressed into a PressFit BB30 (PF30) bottom bracket Shell and will then allow you to fit a normal Threaded style bottom bracket.
CERAMIC Bearings Prime BB386 Evo SRAM DUB Pressfit Bottom Bracket - RRP£90
SRAM PF30 PressFit Road BBRight Bottom Bracket
SRAM DUB PressFit (MTB) 107mm Bottom Bracket
Sram GXP Pressfit Road bike Ceramic bottom bracket
SRAM DUB Pressfit MTB Bottom Bracket, Black, 89/92 mm
Sram Truvativ Powerspline MTB Bottom Bracket - 113 x 73mm