The STB-EP is a multi-function EP adapter that functions as a spirit level, EP adapter, and record stabilizer. The hole size of EP records (7-inch singles, doughnut records) varies depending on the year and country of production, and there are currently very few EP adapters that are accurate enough. During product development, we meticulously researched doughnut records available on the market. After numerous prototypes, we determined the adapter diameter of the STB-EP to fit most doughnut records perfectly. It is designed and manufactured with micron-level precision. By minimizing eccentricity and firmly fixing the EP record, tonearm operation is more stable and pitch fluctuations are reduced. This allows for smooth, high-quality playback of doughnut records. ■Features: Made from heavy metal, it is more stable than unstable plastic EP adapters and allows you to remove EP records smoothly. - Fits comfortably in the hand and is beautifully machined from brass, buffed and finished with a hard chrome plating. The ergonomic design features a curved body that makes it easy to grip and prevents it from accidentally being dropped onto the board. A lightweight and easy-to-use record stabilizer that doesn't put strain on your record player. The spindle insertion hole diameter is dimensionally controlled to fit almost all record players. Compact and space-saving. With a diameter of just 38mm, it can be easily placed next to the record player when changing records. Equipped with a large, 25mm diameter light blue level tube for excellent visibility. This allows for easy and smart leveling. By leveling the player, the tonearm operates smoothly, resulting in higher-quality record playback. ■Product specifications Dimensions: diameter 38mm, height 27mm Mass: 130g Body: Machined brass, chrome plated finish Vial tube: Acrylic Vial sensitivity: 0.50mm/m = 0.028° (inclination at which bubbles begin to move) ■Precautions for use Before installing, make sure there is no dirt or protrusions on the contact surface. Do not subject the vial to impact as this may cause it to break. *This product cannot be used with record players whose center spindle protrudes more than 19 mm.