Specifications Topeak FastFuel Tri Station Top Tube Bag + Platform Features elastic cord to secure gel packs and other fueling supplies Art no. TFFB01 Volume: 0.185 Liters  Bag material: Engineering Grade Polymer / EPDM Color: Black  Bike attachment: top tube via bolts or included velcro straps  Bag dimensions: 15.04cm x 5.45cm x 5.6 cm Weight: 187g $50 MSRP!  New in packaging! Includes (see photos): Quickclick toptube bag Toptube mount Elastic cords for gel packs + quick clip/opener Two Velcro Straps