You can purchase these directly through my store, all built ready to ship!
Each meter is calibrated
Comes with 5 disks/adapters
5 adapters included (1", 1.25", 1.75", 2.5", 3" and 3.5" with no disk)
Link >>> Texas Ace BLF Calibrated Lumen Tube Flashlight Lumen Tester – JLHawaii808