Size: 18x14mm Weight:12g 6pcs/Set
Material: High Temperature Resistant and Wear-resisting Nylon Material Shell
Heavier Sliding Roller Weights= A Slower Take Off Speed with More Acceleration and A Higher Top Speed.
Lighter Sliding Roller Weights = A Faster Take Off Speed with Less Acceleration and Lower Top Speed.
Please Note: The exact performance of upgrade parts will be affected by many other factors