Recirculation Starter Kit For 60cm Minimum Worktop Depths Including: 1 Small Radius 90 Bend (HZ9VDSB4) 1 Large Radius 90 Bends (HZ9VDSB2) 3 Connectors (HZ9VDSS1) 1 50 Cm Straight Channel (HZ9VDSM1) & 1 Diffusor (HZ9VRPD1). Additional Ducting Components May Be Required.