The plastic coated countersunk magnets are with M4 screw hole. The magnets inside are made from neodymium material which meet the demand of strong magnetic force. The plastic cover prevent the neodymium countersunk magnet from damage and corrosion. Because of the good waterproof ability, plastic coated countersunk magnets are called as waterproof countersunk magnets and used in wet environment.
We will contact you within 24 hours.