
HP 131A/X Multipack

HP 131A/X Multipack
I think so, but I can't say 100%. The printer tells me which toner (item number) to use. You can also open the toner drawer. Each cartridge is labelled.
It's in the description: HP Toner weekend4two voucher Buy selected HP toners between 01/08/2017 and 30/09/2017 and register using the link below within 30 days and benefit from coupons from weekend4two!
Yes, these are 4 separate cartridges. Black is X, the rest is A. See also product page -> Products in a set.
On the website https://h30248.www3.hp.com/recycle/ereturns/welcome-hpe.asp?__cc=ch&__la=de you can choose several options: either you send it free of charge by post with a pre-printed label or, if you have a larger company: you can order a collection box from HP and fill it with used toner for a certain period of time. The box will then be collected free of charge.