The Maple leaf hop up "Wonder" type is specially designed to significantly improve the accuracy of your shots. The secret is in the innovative W-shape of the element that makes the BB spin. It is this specific shape that ensures the increasing accuracy. The air seal ring provides extra sealing and prevents the hopup rubber from moving in the hopup chamber

The amount of degrees of the bucking indicates what muzzle velocity it is suitable for.

50° : Less than 360 fps (1.2 J)
60° : 295 fps - 390 fps (0.8-1.5 J)
70° : 360 fps - 460 fps (1.2-2 J)
75° : 426 fps - 490 fps (1.7-2.25J)
80° : over 490 fps (2.25 J)