CLC Professional Ultra Flex®Gel Kneepad, One Size Safety Roll protects ferrous metal parts Overall Width in Inches:30 Roll protects ferrous metal parts or surfaces from corrosion and sold as 1000 per case Battery Backup Connectivity: USB Battery Backup LCD Display: No Battery Backup Run Time: more than 20 minutes Battery Backup or UPS Device Type: UPS Battery Backup or UPS Form Factor: Desktop Battery Life (Years): 2 5 Brand Name: APC Charge Time (hours): 8 Compliance Standards: UL 1778 Knee pad features dual synthetic rubber velcro strap for easy removal and application CLC® Ultra Flex® Flexible professional foam gel knee pad in blue color features rubber cap for easy swiveling and maneuvering on work surfaces