Set of 4. Each piece is 20x20x10mm. Can be used as insulators for audio equipment, or for vibration and earthquake resistance. After purchasing new, they have been cut as shown in the image and stored in a bag. When shipping, they will be wrapped in a bag and cardboard as shown in image 5, and then placed in a brown envelope. Double-sided tape is attached to the bottom. There is powder on the top, which needs to be removed with masking tape or similar. This will consume a fair amount of tape, so please prepare some beforehand. I can remove it for an additional 200 yen, but please understand that there may be some imperfections as it is amateur work. Please understand that there may be some imperfections as they have been cut by an amateur. Price negotiations are not accepted for this product. Please see my profile for other shipping information. Audio DAC Amplifier Speaker DTM Audio Interface Insulator Vibration Dampening Earthquake Resistance