The 1.5" NPT male-to-male coupler is useful in retrofitting legacy camera installations whilst reusing the existing wall mounts. This male coupler can connect any Axis pendant kit (e.g. AXIS T94A01D Pendant Kit) to a legacy mount with either 1.5" NPS or NPT female threads (e.g. 3rd party wall mount). The lock nut is included. Material: Aluminum with black anodizing.