Add to Cart Compare Slotted Adjustable Square Cast Iron PRO28 MSRP: Now: $540.00 Was: The Sliding Base and Slotted Square together provide 3-axis adjustment for heavy fixtures. They work especially well in combination with Flange Clamping Plates and 3D Clamping Squares for pipefitting applications. Product Detail: ... T28-15010 MSRP: Now: $540.00 Was: Add to Cart Compare