No. del item | 							espesor | 							Peso de la base | 							Permeabilidad del aire (L/sqm.s) | 		
				CHKGT7020-2 | 							0.14+0.03m m | 							20 G/M | 							> 7000 | 		
				CHKGT6530-2 | 							0.17+0.03m m | 							30 G/M | 							> 6500 | 		
				CHKGT6040-2 | 							0.25+0.03m m | 							40 G/M | 							> 6000 | 		
				CHKGT5050-C | 							0.28+0.03m m | 							50 G/M | 							> 5000 | 		
				CHKGT6050-2 | 							0.28+0.03m m | 							50 G/M | 							> 5500 | 		
				CHKGT5070-2 | 							0.33+0.03m m | 							70 G/M | 							> 5000 | 		
				CHKGT6070-2 | 							0.33+0.03m m | 							70 G/M | 							> 6000 | 		
				CHKGT5075-C | 							0.40+0.03m m | 							75 G/M | 							> 4500 | 		
				CHKGT5080-2 | 							0.35+0.03m m | 							80 G/M | 							> 4500 | 		
				CHKGT3070-C | 							0.35+0.03m m | 							70 G/M | 							> 3500 | 		
				CHKGT3080-3 | 							0.40+0.03m m | 							80 G/M | 							> 3000 | 		
				 			 | 							 			 | 							 			 | 							 			 |