Wholesale 14.4mm BIIR rubber solid stopper caps/bottle plugs

A BIIR rubber solid stopper can be custom molded for a bottle closure, with the 14.4 mm designation related to the required working dimension. Establish the complete body profile, insertion length and exposed cap area against the bottle neck. One nominal measurement does not define every surface involved in seating the stopper.

Select the finished BIIR formulation for the intended contents and contact conditions. The cap and body should be evaluated together with the bottle, including the method used to insert and remove the closure. Check whether a shoulder controls position and whether sufficient exterior remains accessible after fitting.

During handling, keep the region that enters the bottle free of debris. Inspect the neck and stopper before assembly so an irregular rim or damaged rubber edge does not interrupt contact. Avoid exchanging similarly sized closures solely because their caps appear alike. A replacement should match the specified body and material requirements, and any part with persistent deformation or cuts should be removed from the intended closing arrangement.

Material options

BIIR. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Choose firmness with the BIIR stopper body and bottle neck fit, comparing insertion and removal feel without relying on nominal diameter alone.

Custom dimensions

Establish the complete body profile, insertion length and exposed cap area against the bottle neck.

Fit & assembly

Check whether a shoulder controls position and whether sufficient exterior remains accessible after fitting.

Use & inspection

Inspect the neck and stopper before assembly so an irregular rim or damaged rubber edge does not interrupt contact.

Photos illustrate structure or material only. A BIIR rubber solid stopper can be custom molded for a bottle closure, with the 14. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.