Offered in 4 models, everyone can find the size that fits their need. While kk55 and kk65 come with a kit, bigger model k85 and k105 have attachment for Sevylor SBM18 12V electric motor or MM3 motor mount for SBM30 12V electric motor or larger outboard motors up to 2.5 HP (K85) or 3 HP (k105). All product feature the unique Sevytest to make inflation practical to everyone.