... R3.Application: serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80, ... .Application: serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80 ... .Application: serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80 ... .Application: serves as walls of a well .Packing: bundle or bulk Material grade: J55, K55, N80, L80 ...