This snap-on dent guard is made from high-impact plastic. Use it to protect your horn from dents along the vulnerable forward-facing bell stem. Custom taper is made to fit most horns. Can be adjusted by a repair technician. • Protects the vulnerable bell stem from bumps and scrapes. • Fits most makes and models of horn. • Ideal for marching band or pep band situations. • Adjustable for optimum fit by your repair technician. • Does not affect quality of sound.