Based on this product's specifications, here are some alternatives and similar models
Necklace OHMAMA D-230105 — Submission style with 3 rings, OHMAMA collar accessory
Summary description:
This OHMAMA Submission Necklace D-230105 is a collar-style accessory featuring three metal rings for connection or decorative use. Designed as a submission-style necklace, it serves for attachment of leads, tags or decorative elements and can be used in training, role play or as a fashion piece. Practical for quick connections and adjustable styling; materials and exact dimensions are provided by the manufacturer.