Instructions:  

New design foamy scale wheel for DSR-R30 Retract.
Length adjustable. You just trim the length of wire to suit for your aircraft. Easy setup and more fun.
High impact pring steel, light, and more strength.

Specification: 

Wire Strut diameter: Φ2.5mm
Dimension: 120mm(L) without wheel
Weight: 12.5g (approx.)

Accessories:

Right 120mm Wire Strut   X1
45mm Rubber wheel          X1
Aluminum Wheel Stoppert X1
M2.5 X3mm Screw          X 2