The White Industries External BSA bottom bracket are made in the USA with US sourced 6061-T6 aluminum and utilize smooth rolling Enduro stainless steel bearings. Features: Machined 6061-T6 aluminum bearing cups Enduro stainless steel bearings Outside dust seals are included Internal BB sleeve are not included or available Specifications: BB Interface: English Threaded (BSA) Spindle Diameter: 30mm BB Width: 68 or 73mm Outer Bearing Width: 91 or 96mm Thread Pitch: 1.37" x 24TPI Color: Black Weight: 82g