Wheelchair Cushion 18x16x4x1.5 Ultra Wedge Gel Foam Wedge Diathermy Deep Heat Units 5 to 17 * Folds MSHQ BH190XL 5 to 17 * Folds for easy storage * Seat size 14 x31 * User weight limit 180 lbs *A proven alternative to surgery for some patients * Friction free surface ensures smooth motion * Easy to read pressure gauge provides total control of the force at all times * Blow off valve limits the amount of force that can be applied * A cost effective option to continuous clinical care * Split table design replicates clinical traction and promotes consistency of treatment * Actively moving treatment surface ensures efficient application of traction * Patented pneumatic system ensures relable force accuracy and leak free performance * A portable treatment solution that increases patient compliance and satisfaction * Comes complete no assembly required * Non slip harness incorporate belt organizers for quick set up * Patented pump design incorporates a simple click in place mechanism The ultimate wedge for positioning slide control pressure reduction and comfort * Features: firm foundation fixed wedge shape high density foam incontinent proof inner cover cloth outer cover and safety straps *