There are two Samco kits... One have 4 pieces and the other is the full kit that has 7 pieces... You probably bought the one with the 4 pieces (cheaper)...

Cheers

that's what I thought but I bought the mc18 kit not mc21 kit. Check samco website and it shows more hoses in the picture for the mc21 kit but the quantity of hoses listed for that kit says only 4 hoses.