Dimensions: w/ 42/40 Hole - 15x15x13.5cm - 6-Inch x 6-Inch x 5.3-Inch

RedRock Starter Block PRO w/ 42/40 Hole..4" x 4" x 4" (144/CS)

Red Rock Starter Block Pro w/42/40 hole 10 x 10 x 6.5cm  -  4" x 4" x 2.5" (216ea)
Specifications & Packaging:
RedRock Grow Blocks PRO are the stone wool grow media of choice for commercial cultivators, growers, greenhouse operators, hydroponic operators, CEA facilities, and indoor farmers. (48/Cs) (20 Cs/Plt) (30 Plt/Truckload)