STURDY AND DURABLE - The Sun Umbrella Base Made of Heavy Duty 304 Stainless steel material with high temperature powder coating, waterproof and rust proof. Safe and easy to hold up your deck umbrella, The Patio Umbrella Holder can safely and easily lift your Deck Umbrella, providing more space for your outdoor terrace Deck. SIZEWEIGHT: Tube inner Diameter / 1.53" (The Device is suitable for Sun Umbrella larger than 1 "and less than 1.53" in Diameter) , Deck Railing Post Thickness range: 2.3"≤Thick≤6", Length/22.8", Weight / 5.42 lbs. APPLICABLE: The Deck Patio Umbrella Holder is suitable for most Wooden and Iron Deck Railing Post, The Umbrella Base can be firmly fixed to your Deck Railing and will not cause Damage to your Deck Railing. EASY TO INSTALL: Deck Umbrella Clip set includes all accessories, No tools required, you just need to assemble step by step while hand tightening the plum screws (Whole is Made of all Stainless Steel - Will Not Brittle and Break) to complete the installation. SET OF ACCESSORIES: 1 Tube frame Column, 4 pieces of clamps and all the included screw accessories (All Stainless Steel).We work hard to provide our customers with the best quality products and give you the best shopping experience. Notice： 1. The Patio Umbrella Holder made of Heavy-Duty 304 stainless steel, rust-proof, waterproof, the inner wall will appear a little rust spot belongs to the normal range, will not affect the service life of the Patio Umbrella Holder；
2. For the wooden deck railing, pay attention to check the screws on the fixed Patio Umbrella Holder loose and tight, to avoid the tightening of the wood temperature and humidity, causing the Umbrella Holder to loosen.