BRASS LINER Brass, Copper and SS Screens – Round Hole –  These are used as working screen with lock-lap joints and middle screen liners. These screens are available as to be fitted to basket (Liners) for Continuous type and with lock-lap joints for Batch Type machines as required. Brass, Copper and SS Screens – Conical Slot Hole – These are used frequently for batch type as working screens or for continuous type as middle screens/liners. Middle & Backing Screens- SS or Brass Dovex screens are used in accordance with the basket size as a middle screen (Batch) and as a backing screen (Continuous & Batch). The screens are slightly different from normal wire-mesh.