Topeak Aero Wedge Pack Strap Mount Saddle Bag - Tas Sadel Sepeda Aerodynamic seat bag holds tubes, tools and other repair items. Mounts with our innovative Quick Release Buckle system to fit all railed saddles. Four sizes offered to exactly fit rider’s needs. BAG ATTACHMENT: Nylon straps / Buckle MATERIAL: 1200 denier polyester SEATPOST DIAMETER: Fits ø27.2 - ø34.9 mm ADDED FEATURES: 3M reflective strip, Safety light clip EXPANDING: Medium, large sizes CAPACITY: 0.41 L / 25 ci (Micro) 0.66 L / 40 ci (Small) 0.98 - 1.31 L / 60 - 80 ci (Medium) 1.48 - 1.97 L / 90 - 120 ci (Large) SIZE: 16 x 8 x 7.5 cm / 6.3” x 3.1” x 2.9” (Micro) 18 x 11 x 8.5 cm / 7.1” x 4.3” x 3.3” (Small) 20 x 12 x 11 cm / 7.9” x 4.7” x 4.3” (Medium) 23 x 14 x 13 cm / 9.1” x 5.5” x 5.1” (Large) WEIGHT: 85 g / 2.99 oz (Micro) 100 g / 3.52 oz (Small) 130 g / 4.58 oz (Medium) 165 g / 5.81 oz (Large)