RAM® Mount Size Guide

• Ball Sizes
• Arm Sizes

• 
• 

  Ball Sizes		Short Arm	Medium Arm	Long Arm
  A Size	Overall Length	N/A	2.11" / 53.6 mm	3.57" / 90.7 mm
  	Socket-to-Socket	N/A	1.67" / 42.4 mm	3.12" / 79.3 mm
  B Size	Overall Length	2.42" / 61.5 mm	3.73" / 94.7 mm	6.00" / 152.4 mm
  	Socket-to-Socket	1.75" / 44.5 mm	3.00" / 76.2 mm	5.31" / 134.9 mm
  C Size	Overall Length	3.56" / 90.4 mm	5.69" / 144.5 mm	9.13" / 231.9 mm
  	Socket-to-Socket	2.50" / 63.5 mm	4.66" / 118.4 mm	8.00" / 203.2 mm
  D Size	Overall Length	5.10" / 129.5 mm	8.44" / 214.4 mm	12.98" / 329.7 mm
  	Socket-to-Socket	3.60" / 91.4 mm	6.88" / 174.8 mm	11.41" / 289.8 mm
  E Size	Overall Length	7.31" / 185.7 mm	12.63" / 320.8 mm	N/A
  	Socket-to-Socket	4.98" / 126.49 mm	9.88" / 251 mm	N/A