Original Bondtech OEM set of parts to use on the HextrudORT from the HevORT project. Includes a set with the Hardened Steel R.I.D.G.A. and BMG original 1.75mm secondary Drive Gear. Precision cnc-machined. Sharp teeth for maximum grip on the filament. The perfect choice for a high-performance feeding system. Extremely high wear resistance for use with abrasive filaments. What is included 1x R.I.D.G.A. – BMG Reverse Integrated Drive Gear Assembly 1x 1.75/5.0mm BMG Secondary Drive Gear with integrated needle bearings and one 3×20 mm shaft 1x 3×24 mm shaft 1x Thumbscrew Assembly 1x 4 mm Push-fit Collar 2x 4x8x3 Ball Bearing Technical Specification Shaft length: 27 -0/+0.05 Shaft length to support ball bearings : < 3mm - 3mm > Filament teeth’s center to end of shaft : < 14mm - 13mm > Number of drive gear teeth : 17 Drive gear teeth length : 4mm Mainshaft/drive gear Material: Hardened SteelMaterials Compatibility: Flexible : yes; Rigid : yes; Abrasive : yes. Number of main gear teeth : 50 Main gear teeth length : 3mm See compatibility of RIDGA/IDGA below: https://support.dremc.com.au/en/support/solutions/articles/51000344580-idga-ridga-compatibility-table