The RAM marine grade aluminum mount with 3.25" locking suction base includes a 1" diameter ball and socket system with RAM plastic cradle for the Apple iPod. The holder will fit all generations of Apple iPod with the exception of the 20GB generation 2 and will not block any functions or connections on the iPod. The Twist Lock Suction Cup is designed to have an extra strong hold on any smooth non-porous surface such as glass. Manufactured in the USA and comes with RAM Lifetime Warranty.