I hope this is a mistake on amazons part then, what do you make of it?You mean 250, which is almost double the value now lol, basic range kits are around 250 tests as they use three drops the wider range kits are 150 as they use 5 drops
I couldnt find the one you had pictured but this looked to be the closest to it.
4.4 out of 5 stars 181Reviews
API PH TEST KIT 150-Test Freshwater Aquarium Water pH Test Kit