The BakkerElkhuizen Circular Line is made from compressed material made from recycled plastic bottles and is 100% recyclable. This notebook stands are just as strong as those made from acrylic and considerably improve your posture when used with a mouse and external keyboard. Can be returned to the manufacturer or recycled at the end of its life. Height adjustable: To 3 levels BakkerElkhuizen guarantees the longevity of its products. Register your product before the basic warranty expires on the manufacturer's website using the registration code or the EAN number on your product for an extended warranty of up to 5 years on electronics or even longer warranties on non-electronic products! * Extended warranties apply to all non-electronic products with the exception of all gas spring parts, which are covered by a 5-year manufacturer warranty.