Astralpool Shower anchors Ø 43 mm. Anchors are essential components required to secure the shower to the floor. AstralPool supplies complete anchor assemblies with a locking system for shower disassembly. Made in PVC. Ø 43 mm anchor for models 00091, 00092 & 00099. Ø 63 mm anchor for models 00095, 00098, 19947 & 15841.