Designed for the racer with dual bearing surface on shaft and inside of bore. The BSB XD Slider features true duel bearing technology with a bearing at the base and a second bearing surface on the face of the plunger to give stability throughout its full range of motion. With a larger bore it can handle more side load than any other slider. The larger bore will reduce side load with improved design for extended life. All steel construction with 5/8" hardened shaft, AN wiper and double lip seal. Slider is totally sealed for lest maintenance.