A stand off connects the t-top to your boat's center console unit to greatly increase the stability and strength.Regardless of the t-top manufacturer, you must use the standoffs with your t-top. The lateral support it provides is essential to the overall strength and rigidity. Not using the standoffs might allow the t-top frame to rock or rotate so that the tubing or welds could be compromised. Every Stryker T-Top ships with solid aluminum standoffs that can be cut to match the exact length between the placement of your center console sides and the inside of the t-top's tubing. Two are included with the SG300 and SG600, and four are included with the SG900. Be sure to mount the standoffs in the recommended area(s) designated in the manufacturer's installations guides. If you install them too high or too low, your t-top might not have the best stability, and it could lead to damage. For those of you who have local waters that can get extra choppy or if you have a t-top loaded with accessories making it a more top-heavy, you might consider adding our T-Top V-Brace Stabilizer Kit. We have V-Brace kits that fit the 2" diameter of the SG300 and SG600 plus we have a set the fits the 2.5" diameter of the SG900 legs.