Two- made of high density acoustic foam. Reduce the speaker voice quivered resonates, the sound is more real, precise, is a good choice of your studio Name: Speaker Shock-resistance sponge pad Material: Sponge Color: Black Size: 30cmx20cmx4.5cm(LxWxH) and high quality. mainly composed of upper and lower two pieces Helps to flutter echoes and reduce excess reflections and reverberation Improves vocal and acoustics of your room Perfect for use in recording studios, home theatres and karaoke room note: Speakers NOT included Package included: 1x Speaker Shock-resistance sponge pad( 2 units ) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.