triangle anti dust USB cover silicone plug rubber cap

A triangular USB cover needs to match the surrounding enclosure shape as well as the port position. The triangular outline makes orientation relevant: a cover can appear close to the opening while one corner prevents it from seating fully. The molded contact profile should determine its closed position without pressing on the connector itself.

Check the recess, corner radii, and access available to lift the cover. In the open position, the part should leave room for the intended cable plug to enter without sideways pressure. Any retaining feature included in the design needs to accommodate that movement without repeated sharp bending near a corner.

Remove debris from the mating face before closing and inspect all corners for a raised or folded section. Dust exclusion depends on the fitted interface rather than the outline alone. During reuse, check the corner used most often for opening, since localized pulling can start a tear there. A cover that no longer remains evenly seated should be corrected before its presence is relied on to protect the port.

Material options

Custom silicone compound; formulation and geometry developed together.

Hardness selection

Silicone options: 20–80 Shore A. In the open position, the part should leave room for the intended cable plug to enter without sideways pressure.

Custom geometry

The triangular outline makes orientation relevant: a cover can appear close to the opening while one corner prevents it from seating fully.

Fit evaluation

Check the recess, corner radii, and access available to lift the cover.

Color & OEM

Custom colors; identification clear of connectors and removal features.

Photos illustrate structure or material appearance only. The triangular outline makes orientation relevant: a cover can appear close to the opening while one corner prevents it from seating fully. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.