Medium Size: 175 X 50 X 60 (125 X 80) mm [L *W* H (l*w)] mm in which L = Length; W= Width; H= Height and; l = inner length and; w = inner width in milimeters. 
Providing cushinoning interface to metallic neurohead frame during prolonged brain surgeries
Support's patient's facial contours with complete pressure redistribution.