The RFG12X4Y from Panduit Corp is a navy rectangular raised floor air sealing grommet measuring 10.500" x 2.500" (266.70 mm x 63.50 mm), with a 10.200" x 2.200" (259.08 mm x 55.88 mm) opening.
The RFG12X8Y from Panduit Corp is a navy rectangular raised floor air sealing grommet, 10.500" x 6.500" (266.70 mm x 165.10 mm) overall, with a 10.200" x 6.200" (259.08 mm x 157.48 mm) opening.