[High-quality material] Our snail muffler is made of high-quality plastic material, environmentally friendly, healthy, durable, can be used for a long time, easy to install and disassemble. Good functionality Using these air compressor mufflers can effectively improve the working efficiency of the air compressor, better protect the air compressor, extend its service life, and circulate air through the muffler to prevent or reduce the spread of noise equipment. [Various uses] The modified muffler is suitable for all kinds of equipment. It can be used for air compressors, blowers, exhaust outlets, generators, pumps, exhaust outlets and other noisy equipment. It is an excellent choice for eliminating aerodynamic noise. [Easy to use] The noise filter has a simple structure, is easy to install, and is easy to use. It can effectively prevent dust from entering the equipment and reduce noise when the equipment is working. [Package Includes] You will get 4 snail-shaped mufflers, enough to meet your different daily needs. This is a practical and convenient muffler. It has simple structure, easy installation, good functionality, light weight, wide range of uses and high reliability. It is an ideal choice for oil-free air compressors.Specific parameters:-Material: Plastic-Color: Black-Weight: 256g-Thread size: 16mm-0.63inch/20mm-0.79inch (can be selected)-Size: 90mm*75mm/3.54*2.95inch(L*H)-Quantity: 4pcs-Applicable to: fan/air compressor/boiler/exhaust port/generator/pump/exhaust port, etc.Reminder:Due to the size is measured manually, please allow an error of 1-3mm, thank you! (Except thread)