The Nitrile Chemical Resistant Gloves are reusable gloves, so as long as you take care of them and rinse/wash them soap and water to keep chemical from sitting on them long term they will last. There is no set time on replacement as it depends on use and wear and what happens to them over time through your use. If they start to get holes or tears or chemical coming through to your hands then they should be replaced.
We recommend selecting the glove size based on other types of gloves that he may where. If not sure, opt for the larger size to be sure of the fit. We recommend applying Cy-Kick CS to indoor cracks and crevices as well as glueboards for scorpion control. It is microencapsulated providing for a longer lasting residual and this makes it easier for the scorpion to pick up.
Unfortunately, the Nitrile Chemical Resistant Gloves are only available in a Large and X-Large size. You may find the Bellingham Nitrile Gloves more suitable for your needs and these are available in a Medium size.
Per the product label of Ditrac, "All handlers (including applicators) must wear long pants, shoes, socks, and waterproof gloves. Any person who retrieves carcasses or unused bait following application of this product must wear waterproof gloves." The label also states, "Follow manufacturer’s instruction for cleaning/maintaining PPE. If no such instructions for washables exists, use detergent and hot water. Keep and wash PPE separately from other laundry. Remove PPE immediately after handling this product. Wash the outside of gloves before removing. As soon as possible, wash hands thoroughly after applying bait and before eating, drinking, chewing gum, using tobacco or using the toilet and change into clean clothing." The label does not state that it is required to wear a mask while making your application.