Material: Made of high-quality stainless steel. Sturdy steel construction, excellent performance, corrosion-resistant, durable and safe. Safe and firm: Attaches securely to your rocking chair, allowing smooth turning and rotating without tangling. Operates quietly, reducing stress and vibration. Relieve collision: The spring helps reduce stress from impacts, providing a more comfortable, softer feel and extending the lifespan of your hammock and mounting surface. The suspension spring ring is constructed from high-quality steel. Supports up to 250 kg. Reliable for safely supporting children and adults. The hammock spring absorbs shock from movement, minimizing impact and vibration for a comfortable experience. Fits most punching bags, hanging chairs, cocoon chairs, egg chairs, rattan wicker baskets, hanging lamps, sling trainers, sandbags, and aerial fitness equipment. SPECIFICATIONS: Material: Stainless steel Color: Silver Length: 108mm / 4.25" (Approx.) Package Includes: 2 Piece Suspension Hooks NOTE: 1. There may be slight color variation due to lighting and monitor settings. 2. Measured manually; please allow small measurement deviations. Verify dimensions before purchase.