Groupset：Contains 9 speed cassette11-42T x1 ;9 speed chain Half Hollow x1 ; Bicycle Rear Derailleur Hanger x1;bike link plier with hook x1;Suitable for 9 speed mountain bike. Ultra-Light Cassette : 9 Speed cassette 11-42T， Cogs: 11-13-16-20-24-28-32-36-42T,Cog Material: Nickle-plated High Strength Steel; Carrier Material: Ultra-Light Aluminum Alloy； Weight About : 14.63 OZ Bike Chain: 116- links, 1/2"x11/128", suitable for 9/18/27 speed moutain bike ；50C high strength steel with high strength and 1800KG ultimate tension,Centerless grinding,chromizing technology,Half hollow slotted plates design,Weight About :9.91OZ Bicycle Rear Derailleur Hanger:Made of highQuality Aluminum Alloy and CNC processed. It is Durable and Corrosion Resistant.It is Used to Lengthen the Rear Chain,Make the Flywheel Speed Change More Smoothly，Professionally Used to Modify 40-50T Large Flywheel; Bike Link Plier with Hook :Easy to Dismantle the Chain About VG SPORTS：VG SPORTS is a professional manufacturer of bicycle accessories such as bicycle chain and bicycle cassette. The products are suitable for all kinds of mountain bicycles, road bicycles, commuter bicycles and racing bicycles. The products are compatible with VG sports / Shimano / SRAM ，If you have any questions,please feel free to contact us,we will provide you with quality service and caring answers.

   

• About VG Sports：VG Sports is a professional manufacturer of bicycle accessories such as bicycle chain and bicycle flywheel. The products are suitable for all kinds of mountain bicycles, road bicycles, commuter bicycles and racing bicyclesThe products are compatible with VG sports / Shimano / SRAM 
• We are committed to bringing the latest and most innovative high-quality bicycle accessories to the market.Our mission is to provide a relaxing riding experience for all outdoor enthusiasts.If you have any questions,please feel free to contact us,we will provide you with quality service and caring