If you don't have a digital pH meter, these do fine. Those low end digital meters for $75 or so stop working after 2 years. This is the better cheap option vs very expensive pH meters.
The 1 review before mine stated that his known pH previously tested at over 8; then he knocks his current test strip that is rated to read from 4.6 to 6.2.
These strips are worthless. Testing on my city treated and tested tap water (pH 8.8) they read pH 4.6. Don't buy.