812-6318 Snap together Hood size 1 812-6315 Snap together Hood size 2 812-6324 Snap together Hood size 3 812-6321 Snap together Hood size 4 812-6337 Snap together Hood size 5 812-6447 Both Straight and Right Angle exit size 1 812-6440 Both Straight and Right Angle exit size 2 812-6444 Both Straight and Right Angle exit size 3