4 in. (10,2 cm) retaining cap and vandal resistant locking grate tops a 36" (91,4 cm) semi-rigid mesh tube Factory installed swing assemblies with a 1402 (0.5 gpm; 1,8 l/m) bubbler on a fixed riser makes connecting to lateral lines easy Optional sand sock is ideal for use in sandy soil Check valve Right size for shrubs Minimizes transplant shock Directs water to root ball and adjacent soil Supplements top-down soaking Quicker tree and shrub growth Provide a stable foundation against high winds Reduces waste due to run-off Minimizes evaporation Grate collar has an integrated clip for 1/4 in. (0.6 cm) tubing