Review on Starink Compatible HP 950XL 951XL Combo Ink Cartridge for OfficeJet 🖨️ Pro - Get Reliable Printing Performance with Black, Cyan, Magenta, and Yellow (4-Pack) by John Vann

After a $90.00 price shock replacing three XP colors from Sam's. I decided to try them. Each color replacement unit was 1.9 ounces. Didn't get the weight on HP but the empty weighs 1.0 oz.1. Excellent packaging 2. Good instructions 3. The tape covering the ink hole was very difficult to remove on all colors.4. Didn't have to use the replacement black block that came with the items purchased.5. Note that the $90 Sams devices do not include a black replacement device. We don't have to use interchangeable blocks and see how they behave over time.