Heavy Duty Strut Kit for Aluminum Attic Ladders (1 Pair) Struts are rated at 130 PSI per strut. This kit will NOT fit on Models S2208 and S2210 (Steel Attic Ladders). Werner no longer makes any parts for the S2208 and S2210 ladders. We are unable to answer any questions in regards to this product and cannot assist you.