10 Pack Allied SliderBox (SB-CB) 4" dia. Round Adjustable Fixture Support Box 10 Pack Allied SliderBox (SB-CB) 4" dia. Round Adjustable Fixture Support Box 25 CU.IN. The 4" Round Adjustable Fixture Support Box (SB-CB) is designed for secure installations with nonmetallic sheathed cables, offering a 25-cu. in. capacity and a 50-lb fixture rating. Featuring SLIDERBOX adjustability, it supports both new and old work applications with ease, thanks to its 2-screw mounting system. This durable ceiling fixture box ensures reliable performance for residential and commercial projects. About Us Welcome to Help! Resale, your go-to consignment shop where value meets quality. At Help! Resale, we're dedicated to providing you with an exceptional shopping experience, whether you're looking to find the best deals or consign your gently used items. Help Resale 7200 Fair Oaks Blvd Ste 120 Carmichael CA 95608 Business Hours : Monday-Friday: 9:00 am to 5:30 pm (PST) All product and company names are trademarks TM or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. (description exceeds maximum possible length)