The NOAQ Boxwall corner pieces come in 30 degrees of curvature. Connect 3 individual corner pieces together to form a 90 degree angle. If, for example, you create an above ground pool using the NOAQ Boxwall flood barrier, you would typically require a total of 12 inside corner pieces.
If you connect 12 outside corner pieces, you would form a circle that keeps water out
If you connect 12 inside corner pieces, you would form a circle that keeps water in