This plastic fill spout has a door with a loop and slot for a pin or lock to ensure a secure closure. The door is spring-loaded and snaps shut. 

Specifications

• Overall mounted dimensions: 3.5" x 3.5" square
• Mounting holes: 2.5" square
• Fill Barb: 1-1/4" hose (fits our VTS-947A)
• Vent Barb: 3/8" tubing (fits our VTS-533)
• Color: colonial white