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Size of O rings for cable penetrators

Can someone tell me the exact size of the O rings for the cable penetrators? I’m based outside of the US but I need some soon so I’m looking to buy them in my home country. However, I don’t know the exact sizes as they are not mentioned here: https://www.bluerobotics.com/store/connectors/penetrator-o-ring-set-r1/

Hi James,

The o-rings that we use for cable penetrators are size 013. Here is a link to a drawing with the dimensions of the penetrator o-rings.