Refillable and economical. [Uses] Water thread for surveying. [Functions and Features] Highly visible fluorescent dyed water thread. Comes in a case that protects the threads from dirt. Can be used while in the case. Comes with a cutter for thread cutting. Economical use of water refill (sold separately). [Specifications] Thread Color: Fluorescent Yellow. Thread Thickness: Approx. 0.03 inches (0.8 mm). [Materials] Case: PET Product Size (W x H x D): 2.4 x 5.5 x 2.4 inches (60 x 140 x 60 mm); Weight: 4.9 oz (129 g); Product Code: 4960587057049; JAN Code: 4960587057049; Brand Name: Tension / Product name: Construction Water Thread. Includes a line cutter Please be careful.