<https://abes-online.com/en/street-furniture/planters-tree-protection/tree-protection/tree-guard-662/#product>
<http://schema.org/description>
"A bent, U-shaped steel frame with a diameter of 48.3 x 2.6 mm. Three foundations are required.\r\nOptional: a ground shell for the removable model"
<https://abes-online.com/en/street-furniture/planters-tree-protection/tree-protection/tree-guard-662/>