Many thanks Bryan just the info I needRIO lists all the relevant data on their website for each line. Go to the line you're interested in, then select the weight of your interest (and the color is there's a choice). Once you've made that selection, the data that are specific to that line show up.
Here is an example. https://www.rioproducts.com/products/intouch-rio-gold
Sure wish Airflo would do something like that. I'm having an impossible time trying to find out what the weight is for the first 30' of the heads, and the length and weight of the heads, on their new Superflo Mini Tip lines. I'm trying to get that info for the 6wt versions of those new lines, and I can't get any response from Airflo when I send an e-mail to their customer service. Oh well.