JT's Z3 stands out for its top-class quality and performance at a fiercely competitive price. It is built with X-Ring technology, giving far better and improved strength, performance and durability overall. Features: A nickel colour X-Ring technology Extremely low-friction sealing rings that stop the lubrication being lost from inside Pre-lubricated at the factory, guaranteeing low friction and maximum durability Solid rings for greater resistance to deformation