Description: 4 Sizes Available to Choose. Replacement filter box safe for and plants. Plastic box protects your pump, great for Aquarium Tank Water filtration. Equipped with barrier board prevent the filter material from dropping in tank. Material:Plastic,Color:Black Specification: #1 Size: Approx.30x9x5.5cm/11.81x3.54x2.17inch #2 Size: Approx.40x9x5.5cm/15.75x3.54x2.17inch #3 Size: Approx.30x11x7cm/11.81x4.33x2.76inch #4 Size: Approx.40x11x7cm/15.75x4.33x2.76inch Installation Notes: 1 Step: Take the pipe at the water drain hole. 2 Step: Put the barrier board into the filter box. 3 Step: Put some filter material inside the filter box. 4 Step: Then Put filter sponge above the filter material. 5 Step: Connect the pipe with the inside filter box pipe opening. Package Includes: 1 Piece Tank Filter Box（Pump NOT Included,Only Top Filter Box） 1 Piece Big Pipe 2 Pieces Small Pipe 1 Piece Down Pipe 2 Pieces Aquarium Barrier Board Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item.