The Protective Tube is a 1050 mm tall PMMA acrylic tube designed to safeguard and seal the AOPD of the Orion1 Base. It features Gore-Tex membrane caps that effectively block water| dirt| and condensation from entering the tube. The AOPD's connection cable is securely protected and positioned by an M16 cable-gland| which also prevents water and dirt ingress. For easy installation| two stainless steel rotation brackets are included and can be mounted on the product caps. This product has IP67| IP68| and IP69K ratings for superior protection against environmental factors.