The World's Most Advanced Vacuum Mounting System ! SeaSuckers are Vacuum Cup Mounts, not suction cups. There's a big difference between the two. Our vacuum cups are bigger, which means they're stronger, so you can always count on them to keep your items safely mounted. The 114mm (4 1/2") SeaSucker is rated to hold over 45Kg's (100lbs) ! If you think that's strong, our 152mm (6") SeaSucker will hold over 90Kg's (200lbs)! That amazing strength is combined with an incredible safety feature not found on suction cups; when a SeaSucker starts to lose vacuum (and it will lose some vacuum over time - it's not a permanent mount), it will let you know by exposing a red band. When you see the red band, there's no need take it off and remount, simply give it a couple of pumps, and then you're back to maximum strength. Our vacuum mounting solutions include: * Bike Racks; * Rod Holders; * Cup Holders; * Bait Boards; * Tablet / iPad mounts; * Smartphone / iPhone mounts * GPS & Fish Finder mounts; and * Video mounts