The Evans E-Ring 14" is an acoustic drum damping ring, 14".
 
Suitable for any 14" acoustic drum, this damping ring softens the sound and creates a rounder, fatter sound effect. Made of plastic and highly durable, this ring can be used again and again, retaining its shape and optimum performance quality.
 
The main features of the E-Ring 14" include:
Diameter: 14" 
Wide: 1.5" 
Clear 
Used to control the overtones 
Easy to use
Gives you a round, fat drum sound