Praher Plastics E-9-S3 3" Stainless Steel Spring for use with Praher ABS Sidemount Multiport Valves. Constructed from Type 304 Stainless Steel to withstand corrosion and oxidization. Praher Plastics is a leading producer of Thermoplastic Valves and Fittings. Easy to install and designed for durability, trust Praher for your pool or spa replacement parts.