Description: HOLLOW OUTEven if it encounters rain outdoors, the water will enter from the top and quickly drain from the bottom. It does not accumulate water, so it is not easy to be oxidized and corroded, thereby prolonging its service life. ADJUSTABLE KNOBOnce you have finished Umbrella Pole Mount Stand Tube Set installation, tighten the two fixed knobs on the umbrella base, so that the umbrella pole will not shake even on a windy day. WIND PROOFThe umbrella base provides steel screw, and then screwed into the wooden deck. This allows the base to be fastened to the deck so that your umbrella does not spin and move around in the wind and does not take up foot space on the freestanding support. WIDE APPLICATIONIt can be fixed on the decks of dock, terrace, ships, gardens, villas, hotels, resorts, water parks, commercial, etc., and are compatible with umbrella poles, flag poles, windsock poles and other poles with sizes in 6cm/2.36inch. WHAT YOU GETYou will get 1pc x umbrella stand tube in size of 6x8x30cm/2.36x3.15x11.81inch, 3pcs x gasket, 1pc x screw, 2pcs x adjustable knob, made of stainless steel, durable and reliable, and will not break or deform easily. Specification: Type: Umbrella Pole Mount Stand Tube Set Material: Stainless Steel Color: Silver Umbrella Stand Tube(Upper Dia*Bottom Dia*H): Approx.6x8x30cm/2.36x3.15x11.81inch Package Included: 1pc x Umbrella Stand Tube 3pcs x Gasket 1pc x Screw 2pcs x Adjustable Knob Note: 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.