Formujet HP 862 and 920 cartridges ink Tri-Color Ink Cartridge

I recently bought this product. I can't blame this product despite the fact that, my Printer(HP Photosmart Plus B210) couldn't detect this ink. I learned "how to refill Printer cartridge" with the help of youtube. I somehow managed to refill my Black cartridge without using a proper toolkit. This product neither comes with a manual nor these bottles are convenient to handle.

NO TOOLKIT IN THIS PACKAGE: Refilling your ink cartridge requires a proper toolkit. The toolkit may contain,
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I ordered this product last week and Flipkart was at its best to deliver it on time. One issue you would find with this is that there is no instruction manual to use this product. I did what i thought is the right process, and at the end, had colourful hands. This is a feedback for the manufacturers of the product vs Flipkart.

As a regular user of this ink for filling my HP 1515 printer (Cartridge 678), the ink is of good quality, no problems of clogging the syringe/printhead.
For Mr Gopal Iyer, you should be aware that this ink is not an official method of refilling, so it is most probable that the sellers will not give comprehensive information and run the risk of getting sued. You must do your own research before giving a product a low rating and creating negative images in the minds of the people.