Bending Shoe Product Type Bending Shoe Minimum Compatible Pipe Size 3 1/2 in Maximum Compatible Pipe Size 3 1/2 in Compatible Tool Series STB101 Pipe Bend Radius 15 1/2 in Compatible Manufacturer Model Number STB202 STB202B STB202N STB202X STB221 Compatible Grainger Part Number 25TU90 25TU91 25TU92 Compatible Pipe Schedule 40 80 Compatible Wall Thickness 0.226 in 0.318 in Tool Series BZ