1.light weight, high strength 2. sustainable and enviroment friendly 3. reusable more than 30 times 4. eco-friendly our PVC Hollow type rib reinforced plastic construction formwork. Because it is light, strong, durable, reliable, much longer service life ( reuse more than 30 times), it can be cut by saw, nailed just same as plywood board, very convenient and simple to use, very fast to assemble, ...