2.5mm

(5-PACK) WAGO 231-108/026-000 8-POLE 12AWG FEMALE PLUGGABLE CONNECTOR *D14

The WAGO brand is often specified in solar panel wiring diagrams.

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Precision Miniature Ball Bearings Micro For Car Toy Model Airplane 1/1.5/2.5 mm

Going with this unbranded option means you focus on performance, not logos.

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