The parts are all metal and the Belimo motor is the best zone motor available. Available in sizes from 6" to 16". MOTOR from BELIMO - Highest Rated Motor in industry. RUBBERIZED SEAL Maintians Lowest Leakage possible.This item is in the category "Business & Industrial\HVAC & Refrigeration\Other HVAC & Refrigeration". The seller is "zoningsupply" and is located in this country: US. This item can be shipped to United States.