POLES, Laminated wood: In order to grant their strength and resistance, all wooden components are made of laminated pinewood, which is treated with autoclave risk factor IV. In case this type of wood is subjected to variable weather conditions, laminated pinewood can present some tiny cracks on the surface that do not reduce its durability at all. As regards with Resin and knots, please note that these are part of its natural appearance. PANELS: Methacrylate Plastic Parts: Polypropylene. Fixings: Steel conforming to 8.8 DIN267.