Constructed of tan-colored spun bound polyester, a man made material which is strong yet lightweight, with excellent filtration qualities and is rot and mildew resistant. This material is thicker than the previous Sentry olefin bags. Comes with white drawstring and sewn-in 2 x 3 inch yellow label tag. All sizes except 10" x 17" supplied in dispenser cartons of 50 bags. 10" x 17" supplied in dispenser cartons of 100 bags. Availability: Usually ships the next business day. 3 1/2" x 5 " Hubco New Sentry Sample Bags (Box of 50) SB35O$14.00 Availability: Usually ships the next business day. 4 1/2" x 6 " Hubco New Sentry Sample Bags (Box of 50) SB46O$16.00 Availability: Usually ships the next business day. 5" x 7 " Hubco New Sentry Sample Bags (Box of 50) SB57O$17.00 Availability: Usually ships the next business day. 7 1/2" x 12 " Hubco New Sentry Sample Bags (Box of 100) SB712O$57.00 Availability: Usually ships the next business day. 10" x 17 " Hubco New Sentry Sample Bags (Box of 100) SB1017O$84.00 For information on our full line of geology, geophysical and GPS mapping products, please visit our ASC Scientific main Website at www.ascscientific.com