Please note!! This item may have already been sold elsewhere. We appreciate your understanding. This item is new and unused. I opened one for inspection, but it has not been used. Material: Polyurethane Thickness (mm): 25 Dimensions (mm): 100 x 100 Color: Black Hardness: Asker C15 Reference Load Capacity (kg): 10-50 (per piece) RoHS Directive (10 substances): Compliant Vibration Isolation Frequency (Hz): 26.4～ No pets, no smoking.