The intercooler cools the air between stages and the after cooler cools the air after it comes out of the 2nd stage

and Pole Diameter to see specifications

Model SRP 4008 DYNAMIC Free Air @125 PSI (CFM) 25 Voltage (V) 460 Noise Level (dbA) 69 Tank Size (gal) 60 Discharge Connection (in) 1/2" Motor Power (hp) 7

UPC Product: 00633955588820

6' Back Up Pads Tapered Edge- Stickon 1.0 mm The intercooler cools the airProduct Description Designed for use with Stickon Discs, these one piece construction pads are lightweight, durable, and well balanced. Tapered edges permit more precise control over sanding areas. A specially designed vinyl face with an embossed diamond shape pattern allows fast disc adhesion and clean removal. Max. speed is 10,000 rpm. Features Fits most 6 inch sanders Specifications More Information Part No. 1106 Product Line EAG MFR Model 01106