Product:  Rectangle cufflink blanks for resin 

Material: Stainless Steel
Internal Size: 18.3 x 8.3mm
External Size: 20 x 10mm
Weight:  4.2g per cufflink

Great quality heavy rectangle cufflinks with high shine mirror polished finish.  Overall weight per cufflink is approx. 4.2g which is more than double the weight of the cheaper stainless steel cufflinks that  I have compared them to.  The is a good firm 'snap' on the bullet style swivel fastening that will remain secure.