The 70043-09 is a silicone diaphragm designed as a component for Deltrol Controls' DSVP11 series of 2-way, direct-acting, gravity-fed solenoid valves. This diaphragm is made from VMQ - Silicone, a material suitable for use with water media in various dispensing applications. It serves as a replacement part for maintaining the performance of DSVP11 valves used in systems like floor scrubbers and tank draining.