How much does this cost to the nearest dollar?

Block Silicone Isolation Feet - 4-Pack Subwoofer Isolation Pad w/ 37.5 lbs Capacity - Pads for Small Speakers, Speaker Spikes & Turntable Isolation Pads for Reduced Vibration & Resonance
Designed for Precision & Clarity Equip your stereo equipment with isolation feet that absorb up to 95.32% of vibration and resonance. A simple accessory for amplifier isolation and room treatment, effectively reducing vibration for even the most sensitive stereo equipment. Expect tighter-sounding bass and zero noise for a more elevated listening experience. Sound Isolation Made Easier These pads for small speakers let you hear the difference. Notice a more distinct improvement in mid-high to high range frequency resulting in a crisp and lucid sound quality coming from your audio setups. All our speaker isolation

Price is $
Price: $21.99