Our 13mm Double Rail - 3.0" is aluminum rail, featuring a tough clear anodized finish, to protect against oxidation in the harshest indoor/outdoor conditions. Standard rail length is 196.85” (5 m.), can be cut per customer request. Comes in set of 2. This double keder rail accepts 10 - 13mm keder. Call (888) 727-7050 or Contact Us for a Quote on purchase and bulk options