Buffet Crampon Tosca Barrel Length: 660 Green Line Old Logo Originally, metal rings were attached at the top and bottom, but they have been removed and replaced with rings made of grenadilla wood, the same material used for clarinets. Tosca barrels are also popular as high-performance replacement barrels. Regardless of the R13 series, replacing the barrel softens the sound and makes it easier to articulate. By removing the metal rings, the barrel is physically lighter, making it easier to blow and producing a softer sound. Recommended for those who are bothered by a harsh, shrill sound in the high register! Since it's Green Line, there's no need to worry about cracks (however, Green Line can break like porcelain with a strong impact, so be careful not to bump or drop it). Thank you.