The Bendix 3.7" Type 50 Brake Chamber Diaphragm is a high-quality, durable diaphragm made of neoprene material that is resistant to abrasion, tearing and cutting even when used under extreme temperatures. This diaphragm is more reliable than regular rubber and provides a highly reliable service for easy maintenance and reduced downtime. With its superior construction and reliable performance, this brake chamber diaphragm is the perfect choice for your vehicle. FleetPride is your First Click in Heavy Duty®.