SIRCHMARK tape consists of a matte acetate base that accepts pen or pencil writing. Permanent, quick setting acrylic adhesive coating defies removal from most surfaces. To increase its ability to tear, .1875 (5mm) perforations are every .25 (6mm). Dual-serrated edges add integrity to the 1.5 mil (.0015 ) tape. Translucent red or blue ink (or custom colors) with opaque black identifier or custom imprint. White Stripe versions also offered. All tapes provided on a 3 (7.6cm) core, backed with 50 lb. stock Kraft liner.