Junction Box Extension Ring at Rs 4.5/piece | Electrical Pipe Accessories in Nagpur | ID: 4180600697
Astro Essentials T2 / M42 Extension Tube Set (4mm, 5mm, 6mm, 7mm, 8mm & 9mm) | First Light Optics
RACO 4 in. x 1-1/2 in. D Drawn Square Extension Ring with Eight 1/2 in. and Four 3/4 in. Knockouts, 1-Pack 8203 - The Home Depot
Extension ring 22" (57cm) - Ribolator
RACO 4 in. W x 1-1/2 in. D 2-Gang Drawn Square Extension Ring with Eight 1/2 in. & Four 3/4 in. KO's for Switch Boxes, 1-Pack 187 - The Home Depot
Sigma Engineered Solutions Gray Metal Weatherproof New Work Standard Box Extender Exterior Electrical Box in the Electrical Boxes department at Lowes.com
RACO 187 Drawn Extension Ring, 22.5 Cu-in, 4 in L X 4 in W X 1-1/2 in D, 4", Product Specific - - Amazon.com