RAM-B-247U-3 RAM Square Post Clamp Base for Posts up to 3"...

RAM-B-247U-2 RAM Square Post Clamp Base for Posts up to 2"...

RAM-D-247U-3 RAM Mounts Square Post Clamp Base for Posts up to 3" Wide - D Size

RAM-D-247U-25 Square Post Clamp Base w/ 2.25" inch Ram D-size Ball

RAM-D-247U-25 RAM Square Post Clamp Base for Posts up to 2.5" Wide D-Size Ball

RAM-247U-3 RAM Square Post Clamp Base for Posts up to 3"...

RAM-D-247U-4 RAM Square Post Clamp Base for Posts up to 4"...