Hubbell Raco 4 in. Octagon Box, Drawn, 1-1/2 in. Deep, Two 1/2 & Six 3/4 in. KO's, Raised Ground, Gray, (126): Electrical Boxes: Amazon.com: Tools & Home Improvement
4 in. Octagon Box, Drawn, 1-1/2 in. Deep, Nine 1/2 in. KO's | 125 | Raco
Hubbell-Raco 127 Octagon Box, 4-Inch, Raised Ground 1-1/2-Inch Deep 1/2-Inch and 3/4-Inch Side Knockouts, 4 in, Gray Finish - Electrical Boxes - Amazon.com
Iberville Octagonal Box with NMD90 Cable Clamps | Lowe's Canada
O-Z Gedney 4" 2-1/8" Deep Octagon Box at Main Electric Supply