The product is a set of two vintage 2" Olympic spinlock barbell collars, each weighing 2 1/2 kg (5.5 lbs). Made of durable cast iron, these red collars are designed for gym and training purposes, specifically for weight lifting. They are suitable for unisex adults and feature a spinlock mechanism for easy attachment and removal of barbells. Perfect for those looking to enhance their strength training routine with high-quality, reliable equipment.