Reflectix 4 '' x 25 ' helix Pipe WrapReflectix SPW0402512 4 '' x 25 ' helix Pipe Wrap Features : Simply wraps around your pipes or channel work overlapping approximately 1/2 '' as you go protected with Refectix Reflective Foil Tape -LRB- 4280-3007 -RRB- around each end of your wrapped product Provides an air space between the pipe and the wrap that will aid the insulation value 4 '' x 25 ' roll .