# Strata HST4M Source: https://www.timberdoorsdirect.com.au/door/strata-hst4m/ High density honeycomb or poly core No 1 construction. Varies by state. (refer construction type or technical information). Unique Strata embossed MDF pre-primed faces both sides. Option of rout designs and / or the inclusion of a metallic strip inlay depending on model. Size – 2040×820/770/720/620/520×35 Face Options – HST4M Strata