Hobby Neodymium Rare Earth Super Ring Magnet 20 x 4mm (13/16 x 5/32 in.)

Use one of these Super Strong Neodymium Rare Earth Magnets for hobby projects where you want a ring shape that can be mounted with a screw to a wall or box or attached with thread through the center hole! With permanent magnetic strength and bright nickel plating to prevent chipping, these magnets are a great fit for most hobby projects. 20mm in diameter and 4mm tall with a 5mm center hole, these ring magnets are useful for creating strong connections without gluing or fastening. Couple one of these with our Magnetism Sensor / Reed Switch for a nice proximity sensor such as you'd find in the lid of a box used to detect if it is open/closed.

Specifications:

• Shape: Ring
• Plated with Bright Nickel for Added Durability
• Very Powerful Magnet with Permanent Magnetic Strength

• Material: Rare Earth (Neodymium)
• Rating: N50
• Exact Dimensions:
  • Outer Diameter: 0.787" (20mm)
  • Inner Diameter: 0.197" (5mm)
  • Height: 0.157" (4mm)