Gibraltar SC-MCSA4 4 Inch Mini Cymbal Stacker Easily adds a second cymbal to most stands Screws onto existing 8mm cymbal tilter 6" model provides approximately 4" clearance between cymbals while the 4" model provides approximately 2" clearance Screws onto existing 8mm cymbal tilter 6" model provides approximately 4" clearance between cymbals while the 4" model provides approximately 2" clearance