What comes with the SpeedBlock Head Immobilizer?
983090 - SpeedBlocks Starter Pack. This is the SpeedBlock Base and Block Set. 983092 - SpeedBlocks Block Set. This is just the Block Set, it includes the blocks, block pads, and the head straps. 983060 - SpeedBlocks Universal Base. This is just the SpeedBlock Base along with the base pad and the base straps.