Jobe Crusher Ski TubeJobe Crusher Ski Tube The Jobe Crusher is a 1 person round ski tube with a 56 inch deflated diameter and a comfortable cushioned riding surface. Four handles with neoprene knuckle guards give the rider multiple grip points across the deck. A 24 gauge PVC bladder sits inside a 420 denier nylon cover with double stitched seams. A safety chamber adds backup buoyancy. The one way Boston valve handles inflation and the quick connector hooks to a tube rope