Description: Red Worms Feeder: Red worms feeding cup made of acrylic, eco friendly, safe, and easy to use . Easy to Install: easy to install the fish feeder by the suction cups or hanging hook, can be used in fish tanks and aquariums, convenient to use . Keeps Aquarium Cleaner: with a 2mm hole on the bottom, Keeps the aquarium cleaner so food doesn't spread around so easily . Clear Design: Transparent design is better to know how much food left and whether or not . Attract Fish Attention: fish will out after they are used to the feeder, and will occasionally swim up to assemble there . Specification: Material: Acrylic Color: Clear Size Chart: Suckers 7.5cmx4.5cmx6.7cm/2.95inchx1.77inchx2.64inch Hanging 10cmx4.5cmx6.7cm/3.94inchx1.77inchx2.64inch Package Includes: As You Choose Suckers: 1 Suction Cup, 3 Silicone Ring, 4 Accessories or Hanging: 1 Suction Cup, 3 Silicone Ring, 4 Accessories, 3 Screws, 2 Nuts(2 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.