Plastic plug for air pump oil from 2 hp to 10 hp It prevents the oil contained inside the compressor from leaking out, thus losing pressure and reducing its life span. OTHER SIZES AVAILABLE: - Oil plug for air pumps from 3/4 hp to 1 hp BUSINESS HOURS Monday to Friday from 9:00 am to 6:00 pm. SHIPPING POLICIES If you purchase the product before 1:00 pm, it will be shipped the same day. Otherwise, the shipment will be made the next day (if it is possible). SPECIAL DESIGNS AND FABRICATIONS Ask our executives about special fabrications. We have a machining and micro-machining workshop to make custom parts. We work with stainless steel, brass, aluminum, Teflon, etc.