Fireproofing Depth Gauge Fireproofing Depth Gauge with Heavy Duty Pin - 143 mm / 5 5/8 inches Price 1-5 - $20.00 Price 6 -20 - $19.00 Price 21 up - $17.00 . MSRP: Was: Now: $20.00 Add to Cart Compare Hydracone Fireproofing Depth Gauge MSRP: Was: Now: $20.00 Add to Cart Compare Compare Selected