①length checking system inside is optional
②Rotary cu is optional
③Easy and fast setting
The Spring Coiling is the most used spring for independent suspension devices, which is coiled into a spiral with spring steel. Generally more common, it is used in car seats, motorcycle seats and bicycle seats to play a role in cushioning and shock absorption. Make people feel uncomfortable on uneven roads.
Material:Generally, it is mainly rigid, strong in elasticity, and will not bend.