Trend Aquamac 63 recessing sets ref: 330 & 331 are designed to accommodate the popular Schiegel Aquamac 63 weather strip system & allows for a particularly small gap between sash & frame. The slot can be positioned part way down the side of the rebate or at the bottom of the rebate. Ref 330 must be used with a side fence whereas Ref 331 comes complete with a guide bearing to reduce setting up time. TCT. Tooling: 1/2 in Shank D1 = 41.3 mm. D2 = 28.3 mm. C1 = 4.8 mm. C2 = 2.7 mm. B = 22 = 67 mm.