Filter BoxOur standard galvanised filter box 400x400x150 deep. 1 x 50mm wide slot to house the filter and completed with 2 off 100 dia holes on the faces. This hole can be made bigger to install spigots to suit and fit into your ducting system. 100dia - 400dia spigots can be fitted onto this product. We sell two types of filters to fit this box: G4 pleated filter (Blue) & Carbon pleated filter (Black) *Please note spigots or filters are not included* We can make bespoke filter boxes within a couple of days so please get in touch for a price. SKU: Alph59 £111.16 Qty: Add to cart Custom wishlist OKAdd to wishlistAdd to compare listEmail a friend