Based on this product's specifications, here are some alternatives and similar models
Ferrule Rittal AS 4051.543, copper/polypropylene insulated wire end ferrules 1.5 mm² (8 mm length) pack of 4000, red
Summary description:
Rittal AS 4051.543 is an insulated wire end ferrule for terminating 1.5 mm² conductors. Constructed with a copper crimp sleeve and polypropylene (PP) insulation in red, each ferrule is 8 mm long with a 4 mm outer diameter. Supplied in a pack of 4000, these ferrules provide reliable, secure conductor connections for control cabinets, terminal blocks and industrial wiring.