|  Item | 
 Description | 
 Price | 
| OT-10 | 
Open Tunnel 10 Foot 6″ Pitch, 24″ Diameter | 
$231.15 | 
| OT-10C | 
Open Tunnel 10 Foot 4″ Pitch, 24″ Diameter | 
$283.30 | 
| OT-15 | 
Open Tunnel 15 Foot 6″ Pitch, 24″ Diameter | 
$309.65 | 
| OT-15C | 
Open Tunnel 15 Foot 4″ Pitch, 24″ Diameter | 
$388.80 | 
| OT-20 | 
Open Tunnel 20 Foot 6″ Pitch, 24″ Diameter | 
$388.80 | 
| OT-20C | 
Open Tunnel 20 Foot 4″ Pitch, 24″ Diameter | 
$494.20 | 
| OT-10C-26 | 
Open Tunnel 10 Foot 4″ Pitch, 26″ Diameter | 
$310.70 | 
| OT-15C-26 | 
Open Tunnel 15 Foot 4″ Pitch, 26″ Diameter | 
$422.95 | 
| OT-20C-26 | 
Open Tunnel 20 Foot 4″ Pitch, 26″ Diameter | 
$535.25 |