These NEW billet breathers and a stainless steel element with a billet 6061-T6 top and bottom plate and are now available in a Black finish.Precision machined from 6061-T6 Available in -6, -8, -10 or -12 sizesStainless Steel washable elementCan be securely fastened with a -16 size wrench Heavy-duty construction 50mm Long x 60mm wide (2" x 2-3/8")