Marvin fiberglass base poles are lightweight and extremely durable. The wall thickness is 25% greater than the average pole to ensure a ridged feel. Bright orange coloring makes them easy to spot. Marvin poles feature air craft grade aluminum extension couplings. The coupling is locked by a spring clip that is easily controlled with thumb and forefinger. 1 1/4 in. hollow core round base pole. Can be used alone or at the bottom of a multiple pole set up. It features a female ferrule to allow the user to quickly connect additional poles or pruning attachments. The bottom of the pole features a sturdy rubber cap to keep out dirt and debris.