Rail Gap Gauge Rail Gap Gauge is used for measuring the distance between two adjoining rails Benefits: Joint Gap Measuring Device shape: similar to carrot, tapered. This product is made of stainless steel , long service life. Easy to operate and easy to carry. Specification Model: NW-BB Type: Gap Gauge Material: Stainless Steel Dimensions (L x W x H): 35*15*5cm Measure range: 5-30mm Material: Stainless steel MOQ: 50 Pieces