Middy offer spare latex for their catapults in various colours and strengths. There is the Micro-Fine Blue for the X-Flex 322 caty, along with the Supersoft Orange for the X-Flex 319 and 329 catys, as well as the Mid-Strength Red for the Inter Pro 321 and Large Pro 317 catys, plus the Power Black for the Inter Po 327, Large Pro 318 and Groundbait 316 catys. All come complete with cable ties for fitting to other brands of caty, too. The latex is 100% natural and super stretchy.