This is a Tank Filter from Dubro.
FEATURES: A combination clunk-type weight and fuel filter. Made of sintered bronze to provide the ultimate in fuel filtration. Can be used with gasoline or glow fuel. Designed to fit all clunk tanks.
INCLUDES: One Tank Filter.
REQUIRES: Clunk-type fuel tank
SPECS: Length: 1" ir/kh
BOX DIMENSIONS: 2.25" W. X .50" H. X 2.25" L. BOX WEIGHT: .02 LBS.