A 3D model of two sports balls, featuring a black-and-white pentagon-hexagon pattern and a brown body with black stripes, crafted from leather-like material. It has a realistic aesthetic, highly detailed textures, and is suitable for sports-related displays, gaming, and educational contexts.

A 3D model of a pull-up bar, featuring a vertical structure with multiple parallel metallic bars and minimalist, functional design. It has a sturdy frame and is suitable for pull-ups and upper body fitness training.

A 3D model of a billiards table, featuring green felt, brown wooden frame, and metal edges, with a modern design. It has low polygon count and smooth surface, suitable for home entertainment and leisure activities.

A 3D model of an inflatable boat, featuring red and black inflatable material with oars, seat, and steering wheel, and a sleek functional design. It has lightweight, foldable technical features, suitable for recreational boating, fishing, or leisure activities. （说明：原类目Fitness Equipment不准确，识别为水上运动器材Inflatable Boat，按要求格式描述其核心特征、材料、设计风格、技术特点及适用场景。）