Based on this product's specifications, here are some alternatives and similar models
Rittal AS 4051.599 ferrules, copper core with polypropylene insulation, white, length 8 mm, diameter 2.8 mm, 5000 pcs
Summary description:
Rittal AS 4051.599 ferrules (aderendhülsen) are copper-core, polypropylene (PP)-insulated wire end sleeves in white. Each sleeve measures 8 mm length and 2.8 mm diameter. Supplied in a pack of 5000 pieces, they provide reliable conductor termination for electrical panels, control cabinets and industrial wiring to ensure secure crimped connections.