ApplicationThese air Spring bags are compatible for Peterbilt 379 trucks 29-03200, for Firestone W01-358-7036 and for Goodyear 1S5-186.OEMandPart NumberFor Firestone W02-358-7036, W023587036, W02-3587036 For Goodyear 1S5-186 compatible for Peterbilt 29-03200, 2903200, 2902454Specification- Condition: 100% Brand New - Quantity: 2 piece in one set - Warranty: one year Warranty for any manufacture defect. - Placement on Vehicle: Front Left & RightFeature- Mates with OE Air Lines. - Designed for Comfort Suspension and high quality. - Fast Shipping. - Replaces the original spring, OE quality. - Safe carrying capacity and stability. - High-quality materials according to OE specifications, for high load capacity and long service life.Feature- Direct replacement. Ready to use. - Mates with OE Air Lines. - Designed for Comfort Suspension.Note- These air suspension bags are aftermarket ones. They will replace the original rear air springs. - Instruction is not included. Professional installation is recommended. - Contact us please for whatever we can help.