This protective foam fits all standard and Olympic bars (approximately 35-38 mm in diameter). This product helps alleviate painful pressure on your shoulders during heavy squats. The foam provides cushioning and support, helping to reduce unnecessary weight on the neck, shoulders, and spine. It ensures optimal comfort while training with the bar. The high-quality, durable material ensures that the protective foam does not slip or roll off the bar. The product is lightweight and can be easily transported in a gym bag.