Oral-B iO Ultimate Clean Electric Toothbrush Heads, Pack of 6 (White)

Oral-B iO Ultimate Clean Electric Toothbrush Heads, Pack of 6 (White) is down to £28.00 at Amazon. It has typically been selling for around £57.44 over recent months, so this works out at roughly 51% below its usual price.
Its currently ranked 73 in Health & Personal Care on Amazon and rated 4.5 out of 5 from 27,049 customer ratings, so plenty of buyers have already tried it.
Key features:
Twisted and angled bristles designed for deeper plaque removal
Pack of 6 replacement heads in white, made from nylon bristles
Designed for an effective clean, with up to 100% plaque removal from day 1 according to Oral-B
Attaches to compatible Oral-B iO electric toothbrush handles
Oral-B recommends replacing the head every 3 months for best results
Six heads works out at about £4.67 per head, and at the recommended change every three months that is a year and a half of brushing for one person, or a good stock for a couple.