Features: 1) Imported Israel moulds 2) Normal corridor (17mm): a) Good for medium and large size frames b) Popular in European countries 3) Short corridor (14mm): a) Good for small and medium size frames b) Popular in Asia and South America 4) Power range: a) Plano ~ +3.00 / ADD +1.00 ~ +3.00 b) -0.25 ~ -2.00 / ADD +1.00 ~ +3.00