The Alphacool Eiszapfen Acrylic Acetal Inline Filter protects your water circuit from unwanted particles. The mesh size of the filter screen is 0.5 mm, effectively capturing all particles that could potentially damage the pump. The filter consists of four parts: two caps, each with a G1/4" internal thread, the mesh insert, and a crystal-clear acrylic cylinder for visual inspection. When dirt particles accumulate in the filter screen, it is easy to see through the clear acrylic cylinder that the filter needs to be cleaned. Technical specifications: L x D: 48 x 20 mm Net weight: 17 g Material: Acrylic / Acetal Connections: 2 x G1/4" female Thread depth: 6 mm.