Design : Riveting Tooth Type;Total Size : 115 x 70 x 18mm/4.5" x 2.7" x 0.7"(L*W*H) Wire Range:12-24 AWG. Widely Applications: It can connect all kinds of serial devices. Such as computer and tax control machine, digital camera,PLC, PDA, MODEM, set-top box, barcode machine, industrial instrumentation and other equipment for communication. Clearly Labeled Terminals: All the pins are clearly labeled, which is really nice because we keep forgetting the order. No Soldering Required: Just use a small screwdriver to open up the terminal blocks, slide in your stranded or solid-core wire, and re-tighten. Durable: Copper cored gold-plated joints are used for durability, plugging resistance and good contact. It adopts all-copper environmental protection copper terminal, which has good transmission.