A repair, conversion or retrofit kit includes at least two continuously closable replacement baler belts which correspond substantially in their combined width to the width of a continuously closed baler belt to be replaced. The replacement baler belts may be closable in a force-fitting and/or form-fitting manner by a connecting means, and the connecting means may be at least partially hook connectors. In some embodiments, the repair, conversion or retrofit kit further includes at least one guide means arranged on the round baler such that at least two replacement baler belts each extend laterally with respect to the at least one guide means, and the at least two replacement baler belts are guided laterally with respect to one another. In some cases, the guide means is an auxiliary guide disk arranged on a rotatable shaft of the round baler.