Multi-purpose combination: The new K13-3 / K15-3 The K13-3/K15-3 very narrow aisle combi-trucks are designed to carry out efficient storage/retrieval and order picking duties in high density very narrow aisle systems. The rising, cushioned operators cabin gives access to all shelf levels and is designed for either standing or seated mode. Advanced technology and superb ergonomics combine to deliver high performance productivity in intensive warehouse environments.