The Wahl Universal Stainless Steel Comb in Size 2 leaves the coat 6mm. This fits on all brands of A5 blades on both size 10 and size 30 blades, but do check the blade and clipper guide below before you buy. Stainless steel combs are rated for use with all coats including difficult coats (thicker, double, mixed texture, curly etc) for a more secure fit than plastic combs. 

Please ensure your clipper takes an A5 blade prior to purchase.