A distinction must be made between:

shoulders with screw threads:

• S13 – "buttress thread" – is primarily used in the chemical-technical field and for oral hygiene products
• M15 – "metric thread" – is primarily used for cosmetics
• TR 22 – "acme thread" – standard screw thread for a diameter of 50 mm

and flip-top shoulders:

• In this case, the appropriate cap is simply snapped on and remains on the tube.
  If requested, the finger opening of the cap can be aligned with the print image. The size of the opening depends on the cap.

We offer tube shoulders with differently sized openings to meet the requirements of your products. Starting at a certain purchase quantity, the caps are also available in colour.

We are happy to be able to offer safety seals for tubes with screw caps. The seal will be placed over the opening of the tube shoulder and helps provide your customer with a fresher, safer product.