# Cavity Units – Evolution Timber Complete Custom Size up to Min 2340×919 – Max 2400×1200 Source: https://www.timberdoorsdirect.com.au/door/cavity-units-evolution-timber-complete-custom-size-up-to-min-2340x919-max-2400x1200/ ■ Cavity Units are recommended for 35mm doors only. FEATURES: - - Smooth 4 Wheel Ball Bearing Carriages - Jump free U track – Smooth operation - Quick release mechanism - Maximum door mass 70kg - Same architrave height as a hinged door - *Available in plain or H3 treated timber - One Touch Release System - Soft Closer Technology