Product Name: UY Connector Type: 2 Port, Single Blade Applicability : To Connect two Telephone Wires, Data Signal Cables, and Other Conductors. Suitable Wire Diameter: zero Material: Plastic Casing, Gel-Filled Inside * It belongs to U kind wire conductors butt splice, which replaced complicated typical cable twine twist and soldering connection . * Insert two conductors separately into two ports without stripping conductors' insulation; Crimp or squeeze the yellow button onto the inside two conductors with a pliers (here isn't included.); Now you completed it! Gel-filled inside design ensures an air-tight environment for conductors. * High high quality and exquisitely design provide corrosion-resistant function to protect the connection against air and moisture. * Size (Each One): 7/16inch x 5/16inch x 5/16inch (L*W*H) * Package Content: 50 x UY Butt Splice Connector Note:Light and varied displays can cause the color of the article within the picture a bit varied from the genuine thing. The dimension allowed error is +/- 1-3cm.