Safetycheck Large 1-4 x 1-1-2 To 3 HoseThe Safetycheck Large 1 4 x 1 1 2 To 3 Hose type of safety check valve or safety coupling used in specific industrial applications. This is used in a fluid control system, designed to ensure unidirectional flow and prevent backflow. The large size suggests it is designed for high flow or high pressure systems Specification Details TYPE Safetycheck Large DESIGN Compact and lightweight (Ideal for tight space) MATERIAL Rubber for durable,corrosion