Xlab gorilla high grip carbon cagethe gorilla helps prevent bottles ejecting from cages on bumpy roads, and saddle mounted water bottle carriers. The cage has over 2x the gripping force of conventional carbon cages due to the 6 high shouldered carbon gripping fingers, tall retention tab at the top and thicker carbon material. The gorilla cage will fit on any standard cage mounts.featurestall gripping sides for a 14lb grip on bottlestiff top lip helps retain bottlesflared entry for fast insertionthick shelf for large bottlesmaterial carbon fiberweight 39gwarranty because of our engineering and testing for this product we give it a lifetime limited warranty to the original owner.warning to ensure the best possible fit with the gorilla cage, use a bottle that has a groove all the way around that is uniform and fits tightly into the hook at the top of the gorilla cage. Bottles with shorter groves that do not fit properly into the hook like the camelback podium, and bottles with grooves that are not uniform around the entire circumference like the polar insulated bottles are not recommended for use with the xlab gorilla cage, in our experience these two bottles do not stay in place on rear carriers due to the lack of a groove for the cages to grip.buy xlab accessories from chain reaction cycles, the world's largest online bike store.