MGM Brakes' LTR-L3 3" Long Stroke series of spring brake actuators has a double-diaphragm design for an increased reserve stroke, helping to reduce out-of-adjustment citations and improve braking efficiency. A new non-coil clashing power spring provides 100 pounds/445N of additional parking force (at 1.25 inches/32 mm of stroke) over standard 30/30 brakes. A newly engineered weatherseal diaphragm is designed to cover breather holes during operation, effectively sealing out contaminants. The integral release bolt is permanently installed and cannot get lost. The spring brake side of the LTR-L3 is backed by a full six-year warranty. For more information, contact MGM, 8530 Cliff Cameron Dr, Charlotte NC 28269-9786.