Articulated Arm, "B" Size Balls, Long Length Metal Arm, Metal Base Plates - HEAVY
Note: I recommend the RAP-B-Arm-Std-PlBase arm for applications that require 1" (B size) balls because it is light weight and very rugged.  Articulated Arm, Length: 7.4 inches (187 mm), aluminum arm, 2 aluminum base plates with large 1" (25.4 mm) balls, weight: 10 oz (283 g), Diamond shaped mounting plates are 1.25" (31.8 mm) x 2.5" (63.5 mm).  Mounting hardware not included.  This kit contains a RAM-B-201U-C arm and 2 RAM-B-238U base plates.