Shakespeare Style 4700-1 Extension MastShakespeare extension masts can be used to extend the reach of smaller marine antennas by increasing their height above the water or by helping them clear obstructions that would otherwise interfere with proper radiation. Shorter masts are useful for mounting marine TV antennas GPS receivers marine satellite TV dishes and the like.1′ longStainless steel constructionStandard 1″ – 14 threads male upper female lowerOne inch diameterDurable and attractiveProduct : SHAKESPEARE EXT 1FT 4700-1 SS Manufacturer : SHAKESPEARE MOUNT Manufacturer Part No : 4700-1 UPC : 719441110628.