1. computer calibration ball heart balance, high stability and low noise
2. special durable plastic materials
3. steel shaft is not easy to break
4. ball shell adopts advanced silicone rubber slip ring, exquisite and beautiful
There are 3 type for sale, the different it is the start
1.Rope start one,need use rope then can start(this one we will offer 2 rope in)
2.Self start (Inside have spring can start by self after a pull)
3.Self start with led light when moved.