RackSeal Floor Foam Sheets
https://www.datacentreservices4u.co.uk/shop/rackseal-floor-foam-sheets-144
https://www.datacentreservices4u.co.uk/web/image/product.template/144/image_1920?unique=4bc3cd7
50mm Thick, Perforated 25mm Squares, Dark Grey
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30-day money-back guarantee
Shipping: 2-3 Business Days