
Frank Marine
The rail. 25mm is the tube diameter the clamp is made to close on, so measure your rail, bimini frame or roof rack tube before choosing. A clamp sized for 25mm will not seat properly on a thinner tube and will not go around a thicker one.
Cans, stubby coolers and standard bottles sit in it fine. Tall tapered travel mugs and takeaway cups are the ones that rattle or tip in a chop, because an open ring holds the widest part only. Check the base width of whatever you drink from.
Because it lives in the spray with everything else. Plastic holders go chalky and brittle in UV and snap at the clamp, and powder-coated steel bubbles once salt gets under the coating. SS316 just needs a fresh water rinse to stay respectable.

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine
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