NRG's NM720-CS F22-6 or F22-8 attachment paddles connect NRG's SuperFlights to NRG NM720-CS Non-metallic Collector Chain. While the attachment paddles are shipped unconnected to the chain for ease of packaging, NRG carefully assembles the NM720-CS chain in 9-1/2 or 4-1/2 foot strands to be field assembled to the attachment links for longitudinal or cross collector mechanisms. Made from the same low stretch corrosive resistant material as the chain links, NRG's F22 attachments when used in conjunction with our filler blocks provide a rigid support of the flights at the connection.   Least amount of stretch of all 720 non-metallic chains on the market Ultra-Violet & Ferric Chloride resistant No cotters, rivets or retainers required Uni-directional pin seating for ease of installation in close quarters ANSI standard F22-6 & F22-8 hole pattern Curved Chainsaver sidebars V-Reinforced rib structure for high strength Operates on plastic & metallic sprockets Compatible with fiberglass & wooden flights Material:      Glass Reinforced polyester resin Chain Pitch: 6 inch Working Load/Stretch: 3100lbs @ 1% Stretch Av. Ultimate Strength/Stretch: 6000lbs @ 2% Stretch Weight: 1.3lbs/ft Allowable Twist: 25° (on 10ft Strand) Allowable Camber: 9-1/2" (on 10ft Strand) Pin Material: Reinforced Nylon Pin Diameter: 7/8 inch