Strain relief bushings Feature: 1.Material:PA66,UL 94V-2 2.Color:Black&White 3.Type:Round&Flat 4.Certification:UL,CSA Strain relief bushings:Instr:Flat type:2P-4,3P-4,3W-1,4N-4,4K-4Round type:5N-4,5P-4,6N-4,6P-4,6N3-4,6P3-4,7N-2,7P-2,8P-2,9R-1 Strain relief bushings