Marine Pneumatic Rubber Fender: Structure Type Of Marine Charged Rubber Dependable Ball Type Of charged Rubber Dependable Ball Marine charged rubber dependable ball without jacket of me belongs to the basic type; normally it is black or can be other color as per customer's demand. To avoid damage by protruding material near the surface, jacket can be provided as per user's need. The jacket has three types. Tyre Network Type Rubber Network Type Cord Network Type Tyre Network Type: tie several tyres on to the ball, two ends are tied on special flying ring which can turn flexibly. It is suitable for large size dependable ball. Rubber Network Type: tie special rubber padder onto the ball, it can shrink or stretch freely when squeezing. It is suitable for medium size & small size dependable ball. Cord Network Type: weave a net cover by nylon rope; tightly tie it on the ball. It is situ for small size dependable ball.