... promber 3.easy to install and clean 1.Material: 35% environmental plastic material, such as HDPE/PP, 55% croude wood ... ·Requires no painting ,no glue,low maintenance·100%recycled,environmental friendly,saving forest resources·Barefoot friendly,anti-slip,no cracking ... 2008 Certificiate ISO 14001:2004 CertificateSGS Certificate: 2012 Fire-resistant water proof and environmental protection wpc flower box