13.2-15.7mm

Oetiker 16700016 Stepless One Ear Clamp 13.2mm (Closed) - 15.7mm (Open) 200 Pack

If you test lubricants, the MOS2 3-4 ยต Fisher (15-30 Microtrac) is a known benchmark.

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Oetiker 16700016 Stepless One Ear Clamp 13.2mm (Closed) - 15.7mm (Open) 100 Pack

I trust Ford for heavy-duty applications like this one.

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