Ateco 783 - 55 Piece Cake Decorating Set, Includes 52 Stainless Steel Tubes, 1 Standard Coupler, 2 Flower Nails in Hinged Storage Box

Q: in this package comes the numbers 21, 12 and 91?

21 and 12 were in the kit, 91 was not in it.If you read my review I list all tips included.Tip Numbers from Ateco:Plain 00, 1, 2, 4, 6, 8, 10, 12, 261Stars 15, 18, 21,24, 26, 30, 32, 302, 199Flat (plain and ribbed) 44, 46,47, 48, 150Petal 61,80 & 143 (u shaped), 101, 104, 59°Leaf 68, 263, 264, 349, 35288, ,96 ,98, 100Specialty Tips2 paralel lines #42, 105, 133, 136, 71,3 Dots #221225401070090Big Tips:Closed Star 108Leaf 112Petal 127Filling 230Flower Nails 907 & 909Adapter #400

Q: Is there enough room in the case to stack one or two extra tips on top of the ones already in the case?

Yes there is enough room stack at least one on all the tips. I just tried it and depending on size and shape you can stack as many as four and have it close and latch. Good luck.

Q: please few pastry tube includes the set of 55 pieces?

yes this is a 55 pieces set with 53 tubes and 2 flower nails. They are the best on the market and I'm loving mine. Hope I've been able to help you. Don't hesitate on buying this set you will not regret it.

Q: How do these compare to Wilton tips? Also, will they fit into the Wilton's coupler?

I gave these as a gift to my daughter but she said that yes they will fit the Wilton coupler & that they work just as well. She said the only problem was that one of them rusted which she never had happen with any Wilton ones.