Surly Revelate Designs Spinelock Seat Bag Size:10L From its 16-gauge steel housing

From its 16-gauge steel housing with pry-resistant security band and barrel key lock to its patent-pending dual crossbar latch mechanism the Alpha Elite delivers top-notch security that standard lock boxes can

YKK™ full zip closure in back that helps keep you dry while allowing for ease of wear

The Shuffle II has a bigger blade

Pack volume:   50 l

Surly Revelate Designs Spinelock Seat Bag Size:10L From its 16-gauge steel housingThe Revelate Designs Spinelock Seat Bag integrates user tested and approved features like a one way air purge valve, rear light slots, loop and bungee deck, and an external plastic bottom with a new patented attachment system built for stability Innovative Spinelock stability system completely eliminates side to side sway Two mounting positions to accommodate seatpost setback and saddle adjustments Low profile, high strength, forged aluminum clamp