The CB-12BJ is a protector designed to clean your records while protecting your valuable record labels from water submersion by clamping them with the protector on both sides to cover the record label and tightening with screws. Rubber seal around the protector circumference and silicone rubber sheet around the screw hole ensure the protector stays in place while preventing breakage or water leakage. Not suitable for EP, SP board, acetate board, etc. The material of this product is "silicone" or "plastic/AS material". Detergents, solvents, instant adhesives, etc. that contain alcohol, thinner, ethanol, etc., may cause cracking and silicone damage. Please refrain from using cleaning solutions that contain the above ingredients. Note: When installing or uninstalling a record, please take care of the records, so as not to damage the records.