Features: Upgrades for P1P/P1S with this Hall effect switches assembly featuring 3 pneumatic quick connecting fittings for precise materials detection and toolless installation. The plastic construction combines durability with easy handling, while compatibility ensures seamless integration with printer systems. for printing enthusiasts and professional makers seeking filament monitoring solution for continuous creative projects. Optimize print shop workflows or home based prototyping setups by automatically tracking materials feed to minimize printing errors. Engineered with magnetic sensing technology, this accessory package enhances printer efficiency through realtime filament consumption monitoring and secure air hose connection. Specifications: Materials: plastic Size:42mm for P1P/P1S models Package Includes: 1PC Hall switches Assembly 3Pcs Pneumatic Connectors note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.