PENN-PLAX Cascade Betta Starter Kit offers a great value for new fish owners, or for aquarists looking to get most of the tools needed for Betta keeping. This kit comes standard with 9 pieces, including a nano air pump and mini sponge filter. Features: Nano air pump Mini sponge filter 2.5 feet of airline tubing Check valve Betta leaf Cleaning sponge 3" fish net Strip thermometer 1 lb. of decorative Zeolite crystals Fish and tank sold separately Specifications: Air pump: 2" W x 3.25" D x 1.5" H (5.08cm W x 8.25cm D x 3.81cm H) Mini sponge filter: 1.5" D x 3.75" H (3.81cm D x 9.52cm H) Airline tubing: 2.5L (2500ml) Fish Net: 3" W x 2.5" D with a 10" L handle (7.62cm W x 6.35cm D with a 25.4cm L handle)