Lifter data: 30 pcs. Mechanical solid racing jacks from FCP Engineering. Made of forged steel, nitride-hardened surface, hardness HRC 50. The pressure height of the jack on the camshaft must be adjusted using pressure pads (not included). Adjusting the jack requires: 18 pcs. . 6mm pressure pads12 pcs. 7mm pressure padsLifter data intake (18 pcs.): Outer diameter - 23.97 mm Inner diameter - 23.97 mm Outer height - 24.20 mm Stem length - 15.00 mm Flange diameter - 6.00 mm Weight - 26 g Exhaust lifter data (12 pcs.): Outer diameter - 33.47 mm Inner diameter - 31.50mmExternal height - 26.00mmShank length - 15.00mmCollar diameter - 7.00mmWeight - 43g