These closed ends is made from premium and is for the connnection of cables. Each of them is durable for long time of using. Their electrical conductivity is very impressive. For automibile repairing workshops and many other professionals, this wire connector is indispensable. Features -Color: Assorted. -Material: . -Size: 21x11x3.3cm/ 8.26x4.33x1.29inches. -These closed ends is made from premium and is for the connnection of cables. -Each of them is durable for long time of using. -Their electrical conductivity is very impressive. -For automibile repairing workshops and many other professionals, this wire connector is indispensable. -Product Specifications: 8*1/4- product length: 33.3MM, fixed aperture: 6.8MM, connection aperture: 4.8MM 8*5/16- product length: 33.3MM, fixed aperture: 8.3MM, connection aperture: 4.8MM 8*3/8- product length: 33.3MM, fixed aperture: 10.4MM, connection aperture: 4.8MM 6*1/4- product length: 37.3mm, fixed aperture: 6.8mm, connection aperture: 5.9mm 6*5/16- product length: 37.3mm, fixed aperture: 8.3mm, connection aperture: 5.9mm 6*3/8- product length: 37.3mm, fixed aperture: 10.4mm, connection aperture: 5.9mm 4*5/16- product length: 38.9mm, fixed aperture: 8.3mm, connection aperture: 7.3mm 4*3/8- product length: 38.9mm, fixed aperture: 10.4mm, connection aperture: 7.3mm 2*5/16- product length 41.1mm, fixed aperture 8.3mm, connection aperture 8.5mm 2*3/8- product length 41.1mm, fixed aperture 10.4mm, connection aperture 8.5mm Package list: wire connector