Optical glasses, Hollis M3 mask

Loose optical glasses for Hollis M3 diving mask , with strength throughout the glass. A cheap and good solution to see better underwater. Tool for changing the lens is included.

The lenses with strength only come in minus lenses and go from -1.5 to -8.0. The right and left lenses are sold loose, so it is possible to buy different strengths on each side.

NB: The glasses are sold per piece.