LIDO Basic Materials List:Knob - ABS plastic with silicone rubber cover, reverse thread steel shaft.Handle - Diecast Aluminum with full EPD CoatingTop hopper plate - Aluminum with Roller BearingBean Hopper - Eastman Tritan ® Copolyester BPA-Free PlasticRing Burr Carrier - Aluminum with full EPD CoatingAdjustment Ring - Aluminum with full EPD CoatingCatch Jar - Borosilicate Glass jarAxle Shaft - Stainless SteelLower Burr Carrier - Cast Stainless SteelGrinding Burr Set - Hardened Steel1 Year warranty