Please review the picture of each option carefully. 36T Set and 42T Set are A7 non elite 42T RD，46T Set and 50T Set are A7 elite 50T RD Please review the picture of each option carefully. 36T Set and 42T Set are A7 non elite 42T RD，46T Set and 50T Set are A7 elite 50T RD Please review the picture of each option carefully. 36T Set and 42T Set are A7 non elite 42T RD，46T Set and 50T Set are A7 elite 50T RD 【Product Details】: LTWOO A7 10 Speed Rear Derailleur: ·MAX Compatible Sprockrt:42/50T ·Shadow RD with slant design ·Big bearing pulley ·Compatible With Shimano LTWOO A7 10 Speed Shifter: ·1:1 Tech makes quick and precise shifting performance ·Shift cable with hyper low-friction coating ·Compatible With Shimano SUNSHINE Cassette Material: Chrome-molybdenum steel (surface nickel-chromium treatment) Suitable for highway or mountains. The shape of cogs are specially designed for shifting performances 11-36T:11-13-15--17-19-21-24-28-32-36T 11-42T:11-13-15--18-21-24-28-32-36-42T 11-46T:11-13-16-20-24-28-32-36-40-46T 11-50T:11-13-16-20-24-28-32-36-42-50T VG SPORT 10 Speed Chain Size: 116 Links Material: high carbon steel Type: Bicycle Chain KMC X10 10 Speed Chain Model: X10 Dimensions: 1/2'' X 11/128'' Link: 116 Links Color: Silver/Gray/Gold Connector: Missing Link 10R/CL559R Compatible: 10-Speed Drivetrain System Feature -Super Strong Fitting Force, Hydraulic Riveting Technology -2X-SP Wear Resistance Technology -Patented Double X Bridge Design, Precise and Agile Shifting Performance -The Guide Angle Design of The Outer Chain Piece Increases The Smoothness of Shifting -The Guide Angle Design of The Inner Chain Can Improve The Speed Change Performance Gift:Goadlink Workmanship is very detailed, smooth burr-free, precise size. Compact and light, portable to carry. Material: aluminum alloy Size: 5x2cm ---------------------------------- 【Tips】: 1.About the color difference: the products are taken in kind, because the light angle, the display and other objective measures will cause a certain color difference, please understand 2.About size: Due to different shooting angles, it will cause certain visual errors. The product description has detailed size description. It is recommended that buyers purchase their own ruler when purchasing. 3.About damage: We solemnly admit that the parcel may be damaged during transportation. You can contact customer service staff to help you within 24 hours after receiving the product. Precautions: Dimensions are measured manually, please prevail in kind