CableClam.63"Connector Opening (in): 0.63Features:. Perfect for antenna installation. Waterproof co-axial installation without removing connectors. Save the expense of removing and replacing connectors. Avoid poor connections from removing factory connectors. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.