Glass tioata seti o 6, Dia. 50mm

O le seti o loʻo i ai ituaiga ono o le tioata taua., E aofia ai taʻitasi mea nei: plano -concave, convex-concave, faʻalua concave, concave-convex, plano-convex, ma double convex. ? O le lautele tioata o 50-mm approx.