Patented Malleable Fittings

Changes:
Change brass seat to PTFE seat, change conical seat to cone seat.

Features:
1. No Leakage: PTFE is softer than brass then can change easily to seal better when there's external force.
2.PTFE properties: Heat resistant\Corrosion resistant\Wear resistant/Aging resistant\Non-poisonous\Non-flammable.....