The positioning of the top ring has been significantly improved: the sliding top ring comes already pre-assembled on the tank bag with a guide rail, and the tank bag does not need to be drilled.Top ring can be custom-aligned onto the guide rail on the underside of the tank bagMechanical QUICK-LOCK latching system: the magnets guide the upper ring into the appropriate position on the tank ring and the lock snaps firmly into placeTank ring is made to suit the tank filler neck of the bikeBike-specific adapter ring for the best fit and customized solutionsSimple mounting on to the tank neckMagnetic guide aid in the PRO tank ring for easy attachmentQuick release via pull straps allows you to remove the PRO tank bag with one movementThe patented PRO tank ring gives PRO tank bags a secure holdEasy refueling, tank lid can be opened as usualMade from fiberglass-reinforced polyamide, fiberglass reinforced plastic, and aluminumPaintwork-protecting solution: the tank bag does not rest on the tankKit includes:PRO tank ringTwo 6mm height increasing elements includedMounting instructions and materialTank rings from the PRO series cannot be combined with EVO tank bags.Material CompositionFiberglass-reinforced Plastic / Aluminum