For those rod builders, the convenience of purchasing one set of these makes sure the enjoyment of the wide selection of guides. Features: Size(diameter): 30#=30mm, 25#=25mm, 20#=20mm, 16#=16mm, 12#=12mm, 10#=10mm, 8#=8mm, 6#=6mm. Stainless steel frame. Wear resistant ceramic Ring. 8 sizes in a box available for you. Come with a plastic box. Great items for fishing enthusiasts. Specifications:  Color: Black Size(diameter): 30#=30mm, 25#=25mm, 20#=20mm, 16#=16mm, 12#=12mm, 10#=10mm, 8#=8mm, 6#=6mm（in a box） Material: Ceramics & Stainless Steel Package size: 17.5 * 9 * 3cm / 6.9 * 3.5 * 1.2in(L * W * H) Package weight: 206g / 7.2oz   Package List: 5 * 30# Ring 10 * 25# Ring 10 * 20# Ring 10 * 16# Ring 10 * 12# Ring  10 * 10# Ring 10 * 8# Ring 10 * 6# Ring 1 * Plastic Box