Based on this product's specifications, here are some alternatives and similar models
Pull-up Bar Master model MAS4A040 for Wall Bars — Master fitness accessory
Summary description:
Pull-up bar by Master, model MAS4A040, designed to attach to wall bars (ladder-style gymnastic frames). Provides a stable horizontal bar for pull-ups, chin-ups and hanging exercises. Intended for bodyweight strength training and upper-body conditioning in home or gym settings. Simple mounting to existing ladder rungs, suitable for a range of fitness routines.