LTWFITTING Brass 1/4-Inch OD x 3/8-Inch Female NPT Compression Connector Fitting(Pack of 5) the other coral side helps

the other coral side helps collect small particles such as dust

The clip-on filter foam will trap small and large particles and debris to keep your aquarium clean and clear

Pads add scrubbing power

Simply Cut Holes In The Desired Position With Scissors

Custom designed and manufactured for the Fluval 204

LTWFITTING Brass 1/4-Inch OD x 3/8-Inch Female NPT Compression Connector Fitting(Pack of 5) the other coral side helpsType: Male Compression connector Tube Size: 1 4 Inch OD Thread: 3 8 Inch Female NPT Package Content : 5 PCS(Include Nut And Ferrule) Materies: BRASS, Net Weight: 26. 6g PC Choosing products dimensions and quantities at column of size and colour seperately,price would be more favorable if choosing wholesale.