The Explosively Fast NIRTO BEARINGS KITS each contain 8 high speed NITRO BEARINGS , 8 Speed Rings, 16 Replacement Bearings Shields, 4 each 8 or 10mm spacers, 1 bottle of NITRO High Speed Sythetic Lube Oil, and Full directions on how and when to clean and lube your nex Explosively Fast NITRO BEARINGS. All this and a NITRO BEARINGS EXPLOSIVELY FAST STICKER too, contained in a Heavy Duty Nylon See - Thur case with snap lock hinges.