Features 1、Water plug is a metal part used for plastic mold or any pipelines of cooling or heating system, in accordance with the required flow to accomplish filling effect. 2、It is used for plastic molds, water pipelines cooling system, heating system of thermal conductivity. 3、Water plug uses principle of slope, extend O - ring and spring piece to fill. 4、Convenient to use, no need of tapping, never rust. 5、Tightness is adjustable freely, no need of water-stop belt. Specification Features: Water plug is a metal part used for plastic mold or any pipelines of cooling or heating system, in accordance with the required flow to accomplish filling effect. It is used for plastic molds, water pipelines cooling system, heating system of thermal conductivity. Water plug uses principle of slope, extend O - ring and spring piece to fill. Convenient to use, no need of tapping, never rust. Tightness is adjustable freely, no need of water-stop belt. It can be moved freely, placed in any places in water pipelines. Specification: 8mm diameter >16kg/cm2; 10 mm diameter >17kg/cm2; 12mm diameter >19kg/cm2 Operating Environment: Normal Temperature:-10℃~+135℃ Weight: 34g~93g / 1.2oz~3.3oz (approx.) Package list: Note: Package List