4 in. Round Weatherproof Electrical Junction Box Cover with 1/2 in. NPT Thread Outlet for Indoor/Outdoor Use – Landscape Accessories – Bronze - - Amazon.com
Gratury Junction Box, Hinged Cover Stainless Steel Latch IP67 Waterproof Plastic Enclosure for Electrical Project Includes Mounting Plate and Wall Bracket 220×170×110mm (8.6"×6.7"×4.3") - - Amazon.com
11 Types of Electrical Boxes and How to Choose One
Ip67 Ag Series Transparent Cover Outdoor Waterproof Diy Electrical Junction Box Abs Plastic Enclosure Case Distribution Box - Wire Junction Boxes - AliExpress
5" Junction Box Cover Plate | NDR
Covers - Electrical Boxes, Conduit & Fittings - The Home Depot