 - Alpa Metrology HA040 (HA04036)- Manufacturer: Alpa
 - Prism with clamp ALPA HA040 Manufactured with hardened. Entirely ground. With two 90º “V”s. Tolerances of planarity and parallelism. Pontoglio, Italy
 - Alpa Metrology HA040 (HA04040)- Manufacturer: Alpa
 - Prism with clamp ALPA HA040 Manufactured with hardened. Entirely ground. With two 90º “V”s. Tolerances of planarity and parallelism. Pontoglio, Italy
 - Alpa Metrology HA040 (HA04076)- Manufacturer: Alpa
 - Prism with clamp ALPA HA040 Manufactured with hardened. Entirely ground. With two 90º “V”s. Tolerances of planarity and parallelism. Pontoglio, Italy

