Side Seal O-Rings ST1-336414 10/Pack for Carlisle ST-1 Spray gun $39.5 Brand SPF Depot Type Spray Foam Insulation Number in Pack 1 Material Viton Extreme MPN ST1-336414 Unit Quantity 24 Suitable For Carlisle ST1 Guns condition New SPF Depot Brand Premium Side Seal O-Ring 10/Pack for your ST1 guns.SPF Depot Part: ST1-336414Check out all our other parts for your ST1 Guns.