1996 ONKEN, Semi-Trailers - Refuse Trailers, 30 FT GOOD TRAILER, EXCELLENT SHAPE FOR AGE, GOOD TIRES! REQUIRES WET KIT! VAC SYSTEM, OIL CLEAN UP SYSTEM! If you need to collect a product in bulk, then an Onken's trailer will likely work for you. From grease, to oil filters, to organics, to glass and other recyclables, the Onken's trailer and container combination has been used in a wide variety of applications. The options are endless. Increase your efficiency by getting rid of your drums or other small containers and switch to the Onken's bulk collection system., Spring Suspension, Composition, , , L x W x H: 30 x x