I opened it once, but I didn't use it. It's a new, unused item. Vibration-proof rubber mat for washing machines "New Shizuka" TW-660 ↓ From the official website: Color: Black Size: Width 60 x Length 60 x Thickness 9mm (Caster receiving part: Diameter 44mm x 3mm) Quantity: 4 pieces Main material: Non-rebound rubber Load capacity: Recommended within 120kg for 4 pieces Weight: 162g/piece Country of origin: Made in Japan