Heavy-duty construction assures dependable operation in truck, bus, and off-road equipment heater systems. For a maintenance free connection, install with Power-Grip SB clamps Approved for Marine applications. The Green Stripe construction provides best cost-per-mile economics. The cover is abrasion resistant. It has an advanced EPDM tube, cover and reinforcement which can withstand high under-hood and coolant temperatures. The product is designed for use without cracking or hardening. It is engineered to resist electrochemical degradation - the leading cause of hose failure. The specifications exceed SAE 20R1 Type EC, Standard Wall Class D-1. The product reduces water loss from water permeating the hose wall and cover. Its temperature range is from -40 degrees F to +257 degrees F (-40 degrees C to +125 degrees C). Caution: Do not use for fuel or oil transfer applications