Designed to fit the N Male, Hex N Male, and Thick UHF Male coax connector. Designed with a snug fit for gripping power on the connector. Made of black flexible vinyl. Designed primarily to keep out dust and contaminants, they are not intended to moisture proof a connector without additional weather wrapping. For the Hex N Male, push cap on the whole length as caps tend to move back off the Hex shoulders. Note - for regular PL-259 or UHF Male use our slightly smaller cap.