18x16 Midnight Blue Seat Back Upholstery for Invacare Tracer Series Wheelchairs (8881127476) EV Rider Sportster SE Here is a Viper Blue Lectric eBikes XP Step Thru 1.0 Here is a Viper Blue front tiller shroud for the Pride Celebrity 2000 (SC4400) mobility scooter it is wide enough for most adults to sit in comfortably (although a little additional padding is recommended for a hard plastic bucket seat like this) The replacement 18"x16" Midnight Blue vinyl seat back upholstery for the Invacare Tracer series wheelchairs is easy to clean and comes with mounting hardware to secure the back upholstery to the wheelchair's backframe Invacare: 8881127476 (U550)