CUSHION W/C CONVOLUTE FOAM 4X16X18 12/CS Wheelchair Cushions: Made of medical-grade polyurethane foam Medline wheelchair cushions provide support and comfort. Available in solid or convoluted foam, with or without a Nylex cover to address your patients specific needs. Convoluted 18" x 16" x 4".| Made of medical-grade polyurethane foam Available in solid or convoluted foam, with orwithout a Nylex� cover ||75|NON082042|Z106|||||10080196312276|Z1|0.450LB, 0.653CF PER CS|0.450 |LB|NON082051|PF05494|Convoluted Foam Wheelchair Cushion, 16" x 18" x 4" Unit: CS