Bushwhacker Ketchum Black - Bicycle Frame Bag Cycling Triangle Pack Bike Under Seat Top Tube Bag - w/ Reflective Trim Attaches to your frame with a 4-point mounting system. One long zippered compartment. Reflective trim increases visibility. Dimensions: 8" L x 2" W x 7.5" H Constructed with 600 denier polyester rip-stop material.