... contact material, high-frequency transfer of heat treatment process, the ball head shield is made of high-grade polyurethane, good transparency, oil ... *4 Tie link110314300661.56m, thin pipe, small head 3HOWO6*4 Drag linkAZ9719430010thick pipe, big ball head 4HOWO8*4 Tie linkAZ97314300501.59m, thick pipe ...