RAM Clamp Base with 2.25" Ball For Rails 1.25" - 1.875" in Diameter

Features: RAM round rail / pipe base made of two marine grade aluminum castings with 2.25" (D size) rubber ball attached to one Includes 2 stainless steel bolts, nuts and cover caps Fits D size socket arms Clamps to round rails from 1.25" - 1875" in diameter - attaches horizontally or vertically Holds up to 6 lbs. Made in the USA   Included Hardware: (2) 1/4"-20 x 1.5" Screws (2) 1/4"-20 Nylock Nuts (2) Rubber Caps   Brand: RAM Mounts Part number: RAM-D-271U-12 Warranty: Manufacturer's lifetime warranty