A Block is a durable, flexible piece of rubber that is attached to the frame of a vehicle. It has two holes in it, one for the coupler hose and one for the harness hose. The hoses are inserted into the holes and secured with clamps.Attributes:• Manufactured with Rubber which gives excellent corrosion resistance• Manufactured to precise specifications and is built for durability and reliabilityApplications:A Block prevents the coupler hose and harness hose from moving around, which helps to prevent leaks and damage.