Product details:
Luxos new STAYS lenses are for use with KFM LED, KFM, WAVE LED, WAVE+Plus, LFM LED and Circus Magnifiers. 10-diopter (3.5X). The diameter of the STAYS lens itself is 2 (2.5 including the silicon gasket frame). Working distance when used with a 3-diopter or 3.5-diopter lens: 2.9. Working distance when used with a 5-diopter lens: 2.6.
