Made of durable plastic material, feature 1BSP male thread. Ideal accessories for air compressors, quite easy to install. Used widely on the admitting port of air compressors, can greatly reduce the noise of air intake. This is a great option for reducing the noise of your compressor and is a great replacement option. Specification: Material: Plastic Color: Black Application: Compressor Thread Diameter:32mm/1BSP Hole Diameter:28.26mm/1.11" Overall Size(Approx.):129 x 80mm/5.08 x 3.15"(Dia x H) Weight:156g Package Include: 1 x Compressor Air Intake Silencer