Features:3.Black alto saxophone end plug is made of plastic material, convenient to carry, with unique design and exquisite craftsmanship which ensure its popularity and practicality.4.The universal saxophone cap plug can prevent the octave rod from bumping or denting and other samll things from entering saxophone, compatible with alto saxophone replacement part.5.Suitable for many people, such as beginners, school band and orchestra players. Its simple generous design and wide application make your favorite instrument look more beautiful and practical.6.The surface is smooth, non-fading, safe to use, and can be used with confidence.Specifications:Material: PlasticColor: BlackBrand name: BQLZRSize: 41 x 37.5 x 27mm/1.61 x 1.48 x 1.06inch (L x W x H)Socket Inner diameter: 21mm/0.83inchSocket Outer diameter: 24.5mm/0.96inchWeight: 105gPackage include:10 x Alto Saxophone End Plug