The RAM-D-202U-RM1 consists of a 2.25″ ball connected to a 3.68″ diameter round base that contains pre-drilled holes that connect to Raymarine devices listed below.

This base is designed to hold the following devices:
Raymarine A50
Raymarine A50D
Raymarine A57D
Raymarine A70

Material:
Powder Coated Marine Grade Aluminum

Ball Size:
2.25″ Rubber “D” Ball Size