Ink Level Chip by BCH for OfficeJet Cartridge 950 951 XL - Make Cartridge Full Again - Refilled your 950/951 but printer still shows LOW INK? You need this THINGY. Important: Most Recent HP Firmware required. Make sure it is after Oct 12, 2016. Can be installed on either the Original Cartridge or Refillable Cartridge, as Shown in Pictures. BCH is a Certified Partner of a Name Brand starts with H. Package Includes: 4 Chips (Black, Cyan, Magenta, Yellow); Ink Volume: XL; Chip Size: 10.0 mm x 9.7 mm; Cartridge Thickness: 0.6 mm Auto Reset Triggered by: Ink Depletion. Once ink is depleted, open and close the printer door will reset levels to full. Suggested Accessory:B00ULLZZZS and B00UFS640W Suggested Ink: B00H3K3KTI (Dye) B00D4FDL86 (Pigment) B00D4FDLPO (Hybrid)