Copyright © 2025 National Products Inc. Seattle, Washington. All rights reserved.
RAM Mounts USA LLC - 8410 Dallas Avenue South, Seattle, WA 98108, USA
hole pattern:
See Drawing
ball size:
D Size (2.25")
weight capacity:
Standard Use: 6 lbs
Heavy-Duty Use: 5 lbs
materials:
Marine-grade aluminum
packaging type:
Poly Bag
Weight:
2.95 lb
Return Policy:
All products purchased from RAM® can be returned within 30 days with no restocking fee (return shipping not provided). See full return policy here.
Instructions
Documents
QUESTIONS & ANSWERS
Have a Question?
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What backing plate would fit this mount to help me make it more secure when mounting on my kayak?
We currently do not have a backing plate for our D size.
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How big is the base
The base plate for a RAM-109HS-4U is 3.47" x 3.47" with 2.5" x 2.5" hole spacing. The base is 1.81" tall from the bottom of the plate to the mounting point for the swing arm.





