PF bottom brackets are designed to fit bikes with a threadless bottom bracket cup. The bearing cups thread into a centre tube to give a very secure, safe fit. Stainless steel cartridge bearings. Specific fitting tool required (HTTPFA) - purchased seperately. Part Number: BBPF467330SSN, BBPF466824SSN, BBPF468330SSN, BBPF468330SSNS, BBPF467330SSNS, BBPF467324SSN Barcode: 5055168071206, 5055168071176, 5055168071237, 5055168073460, 5055168073453, 5055168071190 Product Code: HOP BB PF46 SB