Pn# - SID128 5 foot of stainless spring guard 1/2-304 Stainless Steel Hydraulic hose Line, spring wrap - 5 foot. This is the spring material that goes over the line as an armor shield protect. Most cars and trucks had it in critical rub areas. It was used to protect the hose or line from other lines and damage from ground cover. Jeeps have it on every line and corvettes have it on very few spots.