`- 30mm crank spindle specific, high-performance bottom bracket\n- Machined from 6061-T6 aluminum with a two-stage anodized black and gold finish\n- Premium Hellbender Neo bearings with solid oil technology\n- Incorporates Swedish manufacturer SKF's patented MTRX technology - an oil-filled, solid polymer matrix that completely fills the free space in the bearing. During use, oil is released from micro-pores in the polymer, continuously lubricating the bearings\n- For installation/removal of notched cup BBs, use 12-notch for 46mm outside diameter BB tool, USE PK-5832