BDK BS-300-BK Durable Foam Lumbar Support 3D Balanced Firmness Cushion-Lower Back Pain Relief-Best for Office Chair, Car Seat, Recliner (Black) Universal Fit High density foam to support the Lower back Provides relief for spinal column and vertebral Disk Easily attach to most chairs and car seats Dimensions: 14.5 x 12.5 x 4.75 inches Easy to install and maintain