700c is the nominal diameter of the rim. Actually, I think it's 622mm. In general, tubes for 700c rims and 27" rims are interchangeable. Remember this, because if you need shrader valves, they are more common among 27" wheels than among 700c rims.
35-43 is the recommended tire width for the tube. It is in mm. So, that tube is for either a 700c or 27" wheel with a tire that is from 35mm to 43mm in width.
48mm is the length of the valve. 48mm is a common short presta valve length. Nothing special.
So, look at the width of the tires that you are using and get a tube for that diameter tire and with the proper valve. They will be available in either shrader or presta in that size. Note that 35mm is about 1 1/2" and 43mm is about 1 11/16" so a tube labeled as 27" 1 1/2 - 1 3/4 will be about the same size tube. Probably interchangeable.
Tubes stretch well so you can likely use a tube labeled for a smaller tire without a problem. 700c 32-35, for example, would be ok. Some people like to use tubes for the next larger size because the rubber will probably end up being a little thicker when inflated -- thus, the thinking goes, more durable. Be careful if you use tubes labeled for tires bigger than you have, because all that flabby rubber tends to get caught between the tire bead and the rim when you mount your tires. We fat people can relate.
Tubes in various sizes are proably more available with presta valves than with shrader. And even though shrader (auto type) valves might seem more understandable at first, I think you will end up liking presta more. So, you can get some little bushings that fit in the shrader holes and adapt them to tubes with presta valves. A great invention, in my opinion.