... 3.OEM service; 4.Warranty:2 years. Office Chair Polyurethane Foam Injection Machine Features 1.Low pressure PU ... for processing polyurethane (filling, casting and injecting) with two or three components;7.The original liquid circulation ... seat armrest, car seat armrest, wheelchair armrest, bumper;2.High resilience foam: bicycle cushions,car cushions, seat cushion, back cushion, chair cushion, ...