I used the following which I purchased from AMAZON, (total of £20) - see below:
MelodySusie 540 Needles Derma Roller (1.5mm)
OZ Naturals - THE BEST Hyaluronic Acid Serum
P.S. I'm flaking today....... similar to the downtime (on day 3) after laser treatment however I really battered my checks this time and there was blood..... 1.5 mm is pretty deep, so I'm waiting for an improvement later this week..... if not I'll just have to wait for another 3 weeks to allow time for the penetrated area to heal and give it another go.