These corrective lenses can be inserted into the new M2004 Intega mask as well as M-211 Freedom One mask. Available in 0.5 diopter increments from -1.0 to +4.5 for left and right lenses. FEATURES Positive Diopters: +1.0 ~ +4.5 Available in Left and Right Negative Diopters: -1.0 ~ -8.0 Compatible Masks: M2004, M2004QB, M-211, M-211QB
