About this item: Stainless steel: Marine grade stainless steel, rust-proof, Excellent seawater corrosion-resistant and durable. Highly polished to a beautiful mirror-like finish Anti-Corrosion Materials: Marine Antenna Mount made of precision cast marine grade stainless steel Exquisite design: The antenna pedestal has two adjustable ratchets. The upper ratchet has an adjustable angle of 270 degrees and the lower ratchet has an adjustable angle of 180 degrees Versatile dual swiveling ratchet design adapts easily to deck or side mounting on slanted or level surfaces Product type: Stainless steel adjustable antenna base Product function: The adjustable antenna base allows users to precisely adjust the direction of the antenna to capture signals from specific signal sources. Installation hole: hole diameter 53MM, you can choose to use /M5 screws to fix the product Surface treatment: electrolytic polishing size: Length: 90MM Width 60MM Material: Stainless steel colour: Silver Package Contents: 1 x Marine VHF Antenna Mounts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.