41-1, Roller Chain Connecting Link Standard ( Master Link ) | Farmer Bob's Parts
Master Link #41 - This is a connecting link for #41 chain which is used on most sliding gate operators (Other sizes available also)
Linear / Osco 2200-027 #41 Chain Master Link for Slide Gate Opener | Linear PRO Access - Linear Gate Operators
41 Master Link Chain Garage Door Opener Connecter - Walmart.com
Amazon.com: Jeremywell 41 Roller Chain 3 Feet with 1 Connecting Links for Go Karts, Mini Bikes, Scooters, ATV, MTV, Dirt Bike and Other Industrial Machinery : Automotive
SGO Chain Master Link Number 40 – Shop Gate Openers
Amazon.com: Jeremywell 41 SS Stainless Steel Roller Chain Connecting Link (10PCS) : Industrial & Scientific