The size is 147*55.5mm(diameter*thickness) and it can hold the cable :0.75mm2, 1.0 mm2, and 1.5mm2. The max retractable length of 0.75mm2cable is 4.8M, hold the current of 8-10A. The max retractable length of 1.0mm2cable is 4.4M, hold the current of 10-13A. The max retractable length of 1.5mm2cable is 3.5M, hold the current of 13-16A. Fixed end cable length, normally is 0.5M, but it can be customized based on your requirement. And for the plugs and connectors on both retractable end and fixed end can be customized based on your requirements. If you need OEM&ODM, welcome to contact with Margaret by sales04 AT dyhretractable DOT com. WhatsApp: +86 18273136972. Skype: margaret_wen09 No matter what field you are in, we have the right solution for you. In fact, 80% of our retractable system solutions are customized according to customer needs. Contact with DYH for customized.