Size detail: our male and female connectors are different in sizes, each male connector measures approx. 13.7 x 10.2 x 5.2 mm/ 0.54 x 0.40 x 0.2 inch and each female connector measures approx. 12.4 x 10.2 x 5.2 mm/ 0.49 x 0.4 x 0.2 inches Long lasting performance: these male and female connectors are made of high-temp plastic material, finely designed for long lasting performance, they possess heat resistant characteristics and good electrical conductivity, brings you better using experience Safe and reliable: the nylon XT30 plugs have better contact surface area which can handle 20 A (30 A instantaneous) current for extended periods without exceeding 80 degree celsius, safe and reliable for long time using Multiple use: we provide you with versatile connectors, they are not only suitable for batteries, but also suitable to be applied for RC batteries, car, quadcopter, boat, plane, helicopter and more, convenient and practical to use Material:plastic colour:Yellow Package Contents: 20 x male plugs 20 x female plugs 40 x red shrink tubes 40 x black shrink tubes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.