Large Bag: Used with Summit HD Shuttle, suitable for all screens up to 10 inches, including the 106 and 8610. XL Bag: Used with Summit HD Shuttle, compatible with Garmin ECHOMAP 12", Garmin GPSMAP 12", Humminbird 12", and Lowrance 12" screens. Inside Dimensions (Inches): Large: 12.25W x 9.5D x 15T XL: 13W x 10.5D x 15.5T Compatible with most FFS Shuttle brands that are under: Large: 12.25W x 9.5D x 15T or XL: 13W x 10.5D x 15.5T These custom-designed bags are tailored specifically for the Summit Shuttle with 1500 denier Cordura fabric, lined with protective padding and the highest quality YKK zippers available. Our bags have evolved from the early years and incorporate years of use and feedback into their current sizing and design. The unique design of the Summit Shuttle bag includes dozens of features specifically designed for Forward Facing Sonar, including weather tight openings for transducer cables, HD pole holders, oversized pockets for pole-mounted transducer storage with drainage, built in sunscreen, and cable management.