Specifications:- Overall Dimension(LxWxH) 3 7/8"" x 3 7/8"" x 11 5/8"" (9.9 x 9.9 x 29.5 cm)- Tube Inner and Outer Dia. 2 1/8"", 2 1/4"" (5.4 cm, 5.7 cm)- Base Plate Thickness 1/16"" (2.2 mm)- Fits Pole Dia. 1 1/4"", 1 1/2"", 1 7/8"" (3.2 cm, 3.8 cm, 4.8 cm)- Material Stainless Steel- Net Weight 2 Lbs (0.9 kg). Package Contents:- 1x Base Plate- 3x Hole Rings- 4x Wood Screws- 4x Expansion Bolts- 2x Knobs- 1x Manual