Position Aid Basic X-Ray 11 Piece Gray Set is the standard most economical positioning aid. It's designed to aid in the positioning, immobilizing and immobilization of patients by using the 11 position aids included. Includes one of each (2x7-1/2x9) Rectangle, (3x8x12) Rectangle, (3x18x24) Decubitus Pad, (1-1/2x8) Diameter Circle, (7x7x24) 45 Degree Spinal Wedge, (3x5x5) Finger Block Single Hand. Includes two of each (3x10x10) 12.5 Degree Triangle, (3-3/4x9x8) 18.25 Degree Granial Block.