Shimano Deore XT Rd-M8150 Rear Derailleur - Shadow Rd+ Di2 11-speed long (Sgs)
Material: aluminum (anodized/painted), glass fiber reinforced plastic (GFRP), steel, stainless steel

Compatibility:

suitable exclusively for E-Bikes
shifter: SW-M8150-R, SW-M8150-IR, SW-EN600-R, SW-EM800-L
cassette: LinkGlide; CS-LG700-11, CS-LG600-11, CS-LG400-11 (11-50)
chain: HG-X11; CN-LG500, CN-HG901-11, CN-HG701-11, CN-HG601-11