17 Spring energized seals, namely, PTFE seals machined from different PTFE and engineered plastic compounds; PTFE lip seals, namely, PTFE seals machined from different PTFE and engineered plastic compounds; polymer products, namely, PTFE seals machined from different PTFE and engineered plastic compounds; non-metallic spring seals, namely, PTFE seals machined from different PTFE and engineered plastic compounds; urethane seals, namely, urethane seals machined from different urethane compounds; non-metal case rotary lip seals, namely, PTFE seals machined from different PTFE and engineered plastic compounds; machined polymer products, namely, PTFE seals machined from different PTFE and engineered plastic compounds