Size detail: Our male and female connectors differ in size. Each male connector measures approximately 13.7 x 10.2 x 5.2 mm (0.54 x 0.40 x 0.2 inches), and each female connector measures approximately 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-temperature plastic material, designed for durability. They offer heat resistance and good electrical conductivity for reliable performance. Safe and reliable: The nylon XT30 plugs provide an improved contact surface area, capable of handling 20 A continuously (30 A instantaneously) without exceeding 80 degrees Celsius, making them safe for extended use. Multiple use: These versatile connectors are suitable for various applications including batteries, RC batteries, cars, quadcopters, boats, planes, helicopters, and more. Material: Plastic Color: Yellow Package Contents: 20 x Male plugs 20 x Female plugs 40 x Red heat shrink tubes 40 x Black heat shrink tubes Note: The package includes only the items listed above. Other products are not included. Note: Lighting effects and monitor settings may cause slight variations in color appearance. Measurement may vary by +/- 1-3 cm.