Description Polaris Quad Bar Mat System This Polaris Quad Bar Mat System provides optimal stability with high-quality foam filling reinforced with polyethylene foam. Available in two sizes to fit either the 6′ or 8′ Polaris Quad Bar, both mat systems are 12cm thick. Item Numbers: [4000M-6] Mat System for 6′ Rail [4000M-8] Mat System for 8′ Rail Rail Assembly and Installation Instructions Find the Polaris Quad Bar System here. Browse more of our high quality Spieth America products here.