They have a whole kit. They Have K.A and HQ Lotions versions. If you're in UK you'll get only the Kojic Based version
(I learnt Mitchellbrands doesn't even ship to the UK)
Maybe you're talking about their Gel with the Pump which has HQ (30ml)
They have a Normal gel too which has Arbutin.
Their TuBe Cream has HQ
The products gives yellow tone/pale yellow @shallalah