U.S. Tape Diameter ProTape 3/8 x 12L - 39375
Graduated in ft., in, and 16ths on one side; dia. in inches, 10ths, and 16ths on the other side. Allows you to convert circumference to diameter. Double-sided tape features a compact design and fast automatic rewind with locking tape. 12L x 3/8W.