Usage Tips:Universal Fit: At 9 inches long, this pool skimmer plug fits most above ground skimmers and works with 1.5-inch and 2-inch tapered pipe threads for large, deep skimmers. Made of premium ABS plastic, the skimmer winter plug withstands harsh winter conditions. Time-Saving: With the skimmer winterizer tube, there is no need to drain your pool underneath your skimmer and refill your pool every year during the winter. Easy to Use: Tightens easily; before installing, verify the pipe is completely emptied and there is no water in the system. Easy Winterization: This skimmer winterizer plug acts as an ice compensator inside the skimmer housing, absorbing the expansion of winter freezing in the skimmer, preventing it from cracking the skimmer housing. Note:The appearance and color may vary slightly from batch to batch, but will not affect the use. Colour:Blue Material:ABS Package Contents: 2 * Expansion absorber 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.