Cycling 2 pcs Bike 13T Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulleys for Shimano & Sram,etc.

Anodised CNC machined bicycle jockey wheel with fully sealed bearing for center bolt derailleurs
Type: 13T;fits for almost all mountain bike of 13T;Support 7/8/9/10 speed
Setting for 4/5/6mm spindle shaft rollers
Material: Aluminum alloy；Stainless Steel bearing for ultra durability
Package Contents: 2 x 13T Wheel Rear Derailleur Pulley, 2 X 4mm Adjustable sets ​，2 X 5mm Adjustable sets ​,4 x Accessory​

Bearings: Upgraded RS bearing
Type: 13T
Material: Aluminum alloy
Color: Black,Blue,Gold,Red
Package weight: 0.05 kg
Product diameter:5.05cm/1.99 inches
Package size (L x W x H): 13 x 11 x 0.5.00 cm / 5.1 x 4.3 x 0.2 inches
Package Contents: 2 x 13T Wheel Rear Derailleur Pulley, 2 X 4mm Adjustable sets, 2 X 5mm Adjustable sets,4 x Accessory