The Nimble works best on aquarium walls up to about 3/16 inch (4.7mm) thick such as standard All Glass tanks 10 gallons and less, and small all-in-one aquariums like the 8 gallon Oceanic BioCube
Measures outside (handle portion): 1¾" x ⅞" x ¾". Measures inside (scrubber portion): 1⅝" x ⅞" x ⅜". (L x W x H).
Also available: Nimble Nano Pad Replacement Set
(Contains 2 scrub & 2 felt pads), and the Nimble Super Algae Cleaner
for tanks up to 33 gallons.