... type *Silage Pit Bags,Silo Bag,Sand Bag,Secure Gravel Bags,Secure Silage Covers with handle, sting SILO BAG are made from 100% ... strong durable HDPE fabric with UV treated, when filled with sand, gravel or ... g / unit Size exterior: 50 x 73 cm170gsm, 125g/bag, left and right woven seam to be 3cm, bottom woven ... unlike tyres will not be full of water Silo Bag, Sand Bag