The size is 110*22mm(diameter*thickness) which can hold DC power cable reel and 2cores flat AC power cable. The max retractable length of 0.5mm2cable is 1.6M, hold the current of 5-8A. The max retractable length of 0.75mm2cable is 1.5M, hold the current of 8-10A. The max retractable length of 1.0mm2cable is 1.2M, hold the current of 10-13A. The max retractable length of 18AWG cord is 1.7M, hold the current of 10A. 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.