Xpelair Simply Silent 100mm Easy-Fit Wall Kit Round-Brown 92993AWXpelair Simply Silent 100mm Easy Fit Wall Kit Round Brown The Xpelair revolutionary Simply Silent wall kit allows fuss free fitting of the outer grille from the inside. The kit comes complete with wall tube. Features Includes external folding grille and 300mm length wall tube Wall tube inner diameter 100mm Wall tube outer diameter 104mm Can be used with all 100mm 4" Simply Silent Contour, Simply Silent DX100 DX100B and Simply Silent LV100 products