v18 are for hatchlings, if you want to purchase from cserpents.com, the racks you need are this for males http://cserpents.com/C_Serpents/Sub-Adult.html and this for females http://cserpents.com/C_Serpents/V-70.html
You might also want to look into animal plastic http://www.animalplastics.com/ they have some great racks at great prices I use the Sterilite 1755 Series for males and females below 2000 grams and use the Sterilite 1860/1960 Series for larger animals.
The advantage with animal plastic is that you can really get the rack you need with the number of tubs you want from as little as 3 to 12 shelves high.
And they also have the economy line which work great if your room temp is steady and above 76/78 degrees.