Durable construction: Made from s and metal for long-lasting performance and reliability. Clear visibility: Features a transparent window devise that allows for easy monitoring of oil levels in screw compressors. Versatile compatibility: Suitable for a wide range of screw compressors, available in sizes from 40mm to 200mm to meet various needs. Essential maintenance tool: Helps maintain compressor efficiency by providing clear indications of oil levels, ensuring timely replenishment. User-friendly installation: devised for easy installation and maintenance, making it perfect for both professional mechanics and DIY enthusiasts., Manufacturer: HIYCYOHDI