RAM® Spline Post Ball Adapter - B Size

Name: RAM® Spline Post Ball Adapter - B Size
Brand: RAM Mounts
SKU: RAP-B-354-419U
Price: 13.29 USD
Availability: InStock
Rating: 5.0 (5 reviews)

RAM® Spline Post Ball Adapter - B Size - Main image

RAM® Spline Post Ball Adapter - B Size - View 2

RAM® Spline Post Ball Adapter - B Size - View 3

$13.29 ~~$18.99~~ In stock

Category: Components

Convert any RAM post/spline base into a ball base on your boat or kayak with this 1" ball with spline post. With this adapter you can use your existing rod holder base to support a wide variety of ball and socket components to hold your phone, camera or other handheld device. With the post and spline function you can easily remove or transfer your double ball mount when not in use.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Henry ★★★★★ Oct 23, 2026

This 1" ball works perfectly with my kayak rod holder, and swapping between the ball and a post base takes just seconds. The spline post locks in tight with zero wobble, making my electronics setup much more versatile on the water.

Julian K. ★★★★★ Oct 22, 2026

Fits snugly into my existing rod holder, and the 1" ball gives plenty of tilt range for my fish finder mount. Installation took maybe two minutes. Exactly what I needed to make my kayak setup more versatile.

Christopher B. ★★★★★ Oct 21, 2026

Swapped out my old base and this ball adapter fit the spline perfectly—no wobble at all once tightened down. Now I can use my existing rod holder base to mount a bunch of different ball accessories on the boat. Solid little piece for the price.