An Engineered Plastic Concrete Curb and Gutter Forming System. The Poly Meta Forms® curb and gutter system is a green, labor and money saving alternative to forming concrete with wood. The unique system utilizes plastic forms in conjunction with steel stake pockets and overhead hangers to place all types of concrete curbs. 120L’ FLEXIBLE RADIUS. 12”back + 6”face + 6” front. 4-boxes of forms (10-12’forms per box) 1 bucket of twist pockets (30/bucket) (front form) 1 bucket of slide pockets (15/bucket) (front form) 8 buckets of 6+6 stacking pockets (5/bucket) (back forms) 8 buckets of overhead hangers (5/bucket) (back to face form) *Stakes not included