Feature●The floor thickness for the lid plate is less than 0.6 inches (15 mm). The finish of the lid is only for the floors●※ Separate lid finish material *Underfloor inspection port is not mildew resistant●For general residential opening dimensions: 18.1 x 18.1 inches (461 x 461 mm)●Inspection opening onlyDescription
Inspection port for underfloor inspection. Floor opening dimensions: 18.1 x 18.1 inches (461 x 461 mm) Silver color