Roho Hybrid Elite Cushion Single Valve 18 x18 x4.25 Mobility Products Colors White w Black Case Frequency Color:Red Colors White w Black Case Frequency Range 219~5663 Hz Total Harmonic Wave Distortion 0 5 * Overall Height: 41 * Seat Depth: 19 Cover with encased comfort foam is machine washable Foam base may be wiped with damp cloth * Neoprene rubber cushion insert can be patched or repaired to extend use * Customized Jay foam base and ROHO air insert are fluid resistant * Cushion size:18 W x 18 D * Wide ranges of sizes also available to fit chair widths 14 to 24 upon request * Weight capacity: 550 lbs * HCPCS Suggested Code: E2622 * 2 year warranty