Product line T-grip 1.Output:20PCS/H 2.Original Material:PE, ... based on compounded PE/PVC. Using area a.Sewer, Subway,Chemical pipe, Culvert, Tunnel, Ocean caisson. b.Post, Electroplating,Landfill factory ... easily and quickly.We are the party who named the product of T-lock and Arrow Lock in Chinese and we ... -lock & Arrow Lock before getting the official approval from us. Product line T-grip