Goodyear Air SpringsGYA2B12-3042B12-304Goodyear Air Spring - Double Convoluted Air BagThis is a bellows style Goodyear air spring. The bellows air springs have one, two, or three convolutions in the flexible member. This double convoluted air bag is typically found on lift springs or axles for trucks and trailers, as an air ride spring, and also as an actuator or insulator on industrial and commercial applications. The specifications will vary on your 2B12-304, but double convoluted Goodyear bags are found in crimped design as well as sleeve type bellows. They will offer similar characteristics and functionality but the sleeve type has the end retainers permanently attached by pinching the flexmember between the end retainers and external crimp rings. Top Plate Hole/Stud: 2Bottom Plate Hole/Stud: 1Top Plate Diameter: 9Bottom Plate Diameter: 9Collapsed Height: 3.4Flexmember: 578-92-3-309Piston:Piston Type:Goodyear Trimmed: 2B12304Triangle Spring Crossover: 4500Firestone Crossover: 7344Conti Tech Crossover: 64501Flexible/Grumman Crossover: 6-336-13Flexible/Grumman Crossover: 6-336-5Conti Tech Crossover: FD330-22500Double Convoluted AirbagAirbagsSuspension and BrakesAirbags