This is a Rocky Roller 4 Inch Hub replacement. The 4 inch hub is used on the commercial Junior, Senior, and High-Riser solar reels. It is also used on solar reels models 3, 4 and 5. (Item RR543 is used on models 3A and 4A solar reels.)
The 4 inch hub can be used to convert a 3 inch tube system to a 4 inch tube system. It is compatible with Rocky’s 4 inch Adjustable Tube and Commercial Tubing.
Please note: this item is fully compatible with systems still using the ulder style irrigation tubing.
