Replaces Models 465LRN, 457 and 1390. Adapts 4,5 OR 6 Hole Midwest Hose Connection to Kavo Handpieces. Fiber Optics AVAILABLE (Non-FO Model Shown Above) Non-Fiberoptic model is perfect for motors and repair facility bench operations. All water and air tubing present and operable. Replaces 5531210 Model 457. Stainless Steel body, wt .5oz 5-Hole Fiberoptic model for operatory use. No bulb required, use where light source is at hose connector end. Full Stainless Steel body, wt. 1.9oz 6-Hole Fiberoptic model for operatory use. Bulb located in end of coupler (included). Requires voltage source at hose connector(ISO 6-pin). Replaces 5531390 Model 1390. Full Stainless Steel Body with Adjustable water control ring. Wt. 2.0oz. NOTE: INCLUDES SPARE SET OF O-RINGS