This snap-on dent guard is made from high-impact plastic. Use it to protect your trombone main tuning slide from dents. Custom taper is made to fit most models by Conn and Getzen, plus others with similar geometry. Can be adjusted by a repair technician. • Protects the vulnerable tuning slide crook at the rear of the horn from bumps and scrapes. • Fits most small-bore models by Conn and Getzen, plus others with similar geometry. • Ideal for horns used in marching band or pep band situations. • Adjustable for optimum fit by your repair technician. • Does not affect quality of sound.