Plastic square marker is made of a PEHD plastic head and of a survey spike in galvanized steel in compliance with the norm NF EN ISO 1461. The length of the survey spike will determinate the anchoring 's depth

Hemispherical plastic marker is made of PEHD plastic head and of a galvanized steel survey spike in compliance with the norm NF RN ISO 1461. The length of the survey spike will determinate the anchoring 's depth