Basic Information? Color: Black Size:28-48 Inch?71-122cm) Material:High Carbon Steel+Strong spring+Pvc Plastic Cap Package Include:6 X Spring Tension Rods Warm Prompt?Before purchasing, please measure the length between the two spaces, it is best for the curtain tension rod to be about 1-2 inches longer than the connection, if it basically matches with the maximum size, it is recommended to choose a longer size of the spring tension rod, in general, the greater the pressure between the tension rod and the wall, the better the use of the rod, it is recommended that the optimal use of the range of 28-46 inches.