About this item Packing quantity: you will get 1 piece 45 rpm adapter for turntable, the diameter of the inner hole is 8 mm/0.32 inches, and the external height is approx. 12 mm/0.48 inches. Durable material: the 45 rpm record adapter is made of quality aluminum, which can increase the contact between the record and the turntable, improving sound quality while reducing resonance and vibration. Wide application: this 45 rpm record adapter works well on any turntable, suitable for home and professional DJ center adapters. It offers excellent stability and durability, allowing you to play 7 inch records conveniently and quickly. Convenient to use: this 45 rpm record adapter has an appropriate size and weight, making it easy to place on the player and safely remove it with both hands through the large internal handle and external side; it will not swing at all. Size: 2.72 x 2.52 x 0.55 inches.