This NEMA 3R single-gang receptacle cover utilizes six "split" inserts which creates virtually any dual device combination as well as providing additional flexibility because the inserts can be rotated 90 180 or 270 degrees. This provides coverage for horizontally or vertically mounted devices as well as "left hand" or "right hand" applications without removing and switching the two installed devices. UV stabilized polycarbonate with two cord outlets measures 3-1-2" wide 5-3-8" high and 2-7-8" deep. Recommended for 16 gauge or lighter cord sets. Shipped with gasket mounting screws base and cover assembly and patented inserts. Meets UL and CSA cold impact testing.