Lotus Connect Store › Eisco Labs Magnet Ceramic Ring 1.375" OD 0.75" ID (Single Magnet) Image 1 of 2 Image 2 of 2 Eisco Labs Magnet Ceramic Ring 1.375" OD 0.75" ID (Single Magnet) $1.65 1 3/8" OD x 3/4" Id x 5/16 wideMagnet Ceramic Rings measurements: 1.375" OD 0.75" ID x 0.3125 wide Quantity: Add To Cart Added! 1 3/8" OD x 3/4" Id x 5/16 wideMagnet Ceramic Rings measurements: 1.375" OD 0.75" ID x 0.3125 wide