Home > Shop Halo Products 4x8x1" HALO EXTERRA (R5) Item #: 05087200 $31.84 ea. Add to Cart 4x8x1-1/2" HALO EXTERRA (R7.5) Item #: 05089105 $42.24 ea. Add to Cart 4x8x2" HALO EXTERRA (R10) Item #: 05091010 $53.12 ea. Add to Cart 4x8x2" HALO SUBTERRA (R10) Item #: 05092915 $75.52 ea. Add to Cart