Airmax TrueRock Small Boulder with Vent Holes, Greystone, 17.5" x 15.5" x 10.5" The small greystone TrueRock boulder measures 17.5" x 15.5" x 10.5" (44 cm x 39 cm x 27 cm) and includes integrated vent holes for routing aeration lines, fountain tubing, or electrical conduit. It sits between the mini (AM-TRV-10G) and medium (AM-TRB-27G) sizes, filling the gap in naturalistic rock arrangements while still providing vent access for concealed pond equipment. Dimensions 17.5" x 15.5" x 10.5" (44 cm x 39 cm x 27 cm) Colour Greystone Vent Holes Yes, for tubing/conduit routing Material Lightweight moulded resin, UV-stable finish Use Rock arrangements, equipment concealment, accent placement How to Use Route airline, fountain tubing, or conduit through the vent holes and position over the outlet point. Group with the TRV-10G mini boulder and TRB-27G medium boulder to create a layered, naturalistic stone arrangement. The vent-hole configuration makes this size particularly useful where aeration diffuser heads surface at the pond edge and need visual concealment. Ideal for pond edge installations where aeration or plumbing equipment needs to be hidden behind natural-looking stone at a mid-scale that fills gaps between mini and medium boulder sizes.
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