MEDLINE items can only ship to a physical address (NO PO BOX).Features & Benefits:Support Pro Zero Elevation Wheelchair Cushions Zero elevation cushion will not add height to the wheelchair Softly curved front edge minimizes pressure behind the knees Soft top layer for comfort; firm bottom layer for support Premium, waterproof, easy-to-clean cover Quick-clip strap secures cushion to chair Product Specs: Accessory Type: Seat Cushion Cover Type: Polyurethane Cushion Type: Flat Depth Inches: 16 " Length Inches: 18 " Material: Foam Pressure Redistribution Level: Basic Thickness: 3.5 " UNSPSC: 42211503 Width Inches: 3 " Wheelchair Cushions: Support Pro Zero Elevation Wheelchair Cushion, 18" x 16"SKU: MDTSPZEC1816Case Packaging: 1 EAItem Specifications: Product Type: WHEELCHAIRCUSHIONS Product Type: Wheelchair Accessory Weight Capacity Pounds: 250 lb Weight Capacity Pounds: 300 lb Manufacturer #: 52B16 Manufacturer: MEDLINE CO-LABEL Latex Info: Not Made With Latex Manufacturer Product Number: 52B16 HCPC Code: NO CODE - PRODUCT DOES NOT MEET HCPCS SPECIFICATIONS Shipping Specifications: Dimensions: 4.75x19.25"x20.0" Gross Weight: 2.95 Unit Weight: LB Disclaimer: HCPCS codes and HSA/FSA eligibility information provided by Medline are intended as general guidelines only. Medline does not guarantee coverage or reimbursement of any products. You must address all coverage and reimbursement concerns with your individual payer(s) and/or plan administrator.