The dimensions of SEFEL closures are very important to ensure the quality and safety of light metal packaging. The following are the dimensions of SEFEL fasteners according to the different types of fasteners:

• Type OIII: Body hook length (mm) 1.70; Cover hook length (mm) 1.60; Minimum overlap (mm) 0.90.
• Type OII: Body hook length (mm) 1.75; Cover hook length (mm) 1.70; Minimum overlap (mm) 0.90.
• Type OI: Body hook length (mm) 1.90; Cover hook length (mm) 1.85; Minimum overlap (mm) 0.90.
• Type I: Body hook length (mm) 1.95; Cover hook length (mm) 1.90; Minimum overlap (mm) 1.00.
• Type II: Body hook length (mm) 2.00; Cover hook length (mm) 2.00; Minimum overlap (mm) 1.10.
• Type III: Body hook length (mm) 2.20; Cover hook length (mm) 2.20; Minimum overlap (mm) 1.25.
• Type IV: Body hook length (mm) 2.40; Cover hook length (mm) 2.40; Minimum overlap (mm) 1.40.
  
  In addition to these dimensions, SEFEL also establishes other critical closure parameters, such as minimum overlap, body hook embedment and degree of lid hook wrinkling. These parameters are essential to ensure the quality and safety of lightweight metal packaging.

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