Konica Konica Inner Diameter 37mm Snap-on Metal Cap This is a metal snap-on lens cap with the Konica name embossed on it. The inner diameter of the mounting opening is approximately 37mm. The outer diameter is 39mm. Please judge the condition from the images. Although it is an old product, it is in beautiful condition. Please take this opportunity to purchase it. Please refrain from purchasing if you are overly concerned about the condition, as this is a used item. We do not accept returns or refunds after purchase.