The highly attractive Forest Nester offers versatile nesting options, by removing the top panel, or adjusting the hole size, it will provide for Blue, great, marsh, coal tits, pied wagtail, robin, wren, house and tree sparrows. It's made from Cedar, Larch and natural coppiced Hazel. No special maintenance is required and non toxic finishes are used. Clean by removing front panel. Supplied with: 29mm hole, 32mm hole, open front