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。）

A 3D model of a basketball rack, featuring metal frame, leather basketballs with brown/white stripes, and a modern minimalist aesthetic. It has multi-tiered design, wheeled for mobility, low polygon count, suitable for gyms, home workouts, sports training.

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 skateboard, featuring a wooden deck with colorful graphic print, metal trucks, and white wheels, and a modern street style aesthetic. It has high polygon details and is suitable for skateboarding parks, streets, or tricks.