Features: The SFS v2.0 is bidirectional, there is no restriction on filament direction, giving you guys more flexibility during installation. It suitable forMarlin, Klipper, andRRF firmware. SFS V2.0 detects extrusion errors caused by filament runout, nozzle clogging, filament tying, and extruder trouble. It has two signal outputs and indicator lights to distinguish between clogging or filament runout. Small and lightweight, it will not add too much pressure to the printer extrusion head. SupportsBowden and Direct-Drive extruders, with 3 mounting holes for easy mounting to printer using bracket. Support motherboards with available endstop ports or dedicated filament runout ports, such as for SKR MiniE3V3.0, MantaE3EZ, MantaM8P, OctopusPro, etc. Please consult our technical support before using the motherboards without filament runout port. Specifications: Size:approx 'Mixed 'Material:Plastic Model: SFS V2.0Smart Filaments Runout Sensor Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement. Package includes: 1PC SFS V2.0 Filament Runout Sensor