The RAP-280U is a double thick octagon button commonly used with the RAP-B-200-1U and RAP-200-1U composite arms.
RAP-280U shown above.
RAP-280U Features:
Warranty: Manufacturer's, RAM Mounts (National Products Inc.), Limited Life Time Warranty.
Material: Black composite.
Description: The RAP-280U is a double thick octagon button. This button is commonly used to attach to the optionalRAP-B-201U and RAP-200-1U arms shown below.