POLES, Laminated wood: In order to grant their strength and resistance, all wooden components are made of GL24 class laminated pinewood, which is treated with autoclave risk factor IV according to Norm EN351/EN335 and certified by PEFC and FSC. 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, HDPE: High-density polyethylene characterised by its resistance to chemical abrasives and unaffected by corrosion as it is a polymer. Due to its light, elastic nature, it offers high resistance to impact, making it very difficult to break. The uniformity of colours in both edges and sides gives it a continuous, even finish. Its synthetic base prevents the appearance of bacteria, fungus and lichen. Plastic Parts: Polyethene, polypropylene. Metallic Parts: Steel S-235, AISI-304, & AISI-316. Fixings: Steel DIN603, AISI-304 or AISI-316. Chains: AISI 316 6mm stainless steel links. Ropes: Braided multifilament, polypropylene coated with high-strength metal cores.