Wilkins Backflow Preventer Repair Kit, For Use With Wilkins No. 34-375, Lead. $29.15
Some schools may also require you to take one or more GRE Subject Tests. The purpose of each GRE examination, of course, is to help graduate schools decide if you've got the right stuff for their program. If you're looking for help with the exam, check out Peterson's full-length GRE practice test.
*Note: GRE scores at the 50th percentile are required for all College of Sciences and Health Professions graduate programs if the undergraduate grade point average is less than 2.75 (3.0 if the degree is more than six years old).