This Spider/Mirror assembly is for use with a 120mm Primary Mirror. The secondary diagonal mirror has a 27mm Minor Axis.
The "spider" is the support that holds the secondary mirror in its proper place within the tube. The vanes run from the tube walls to the diagonal holder. This also includes the securing and adjustment screws for the Spider.
Reflector Telescope 27mm Secondary Mirror with Spider:
Outlet Price = $29.99+ 8.95 S&H (Shipping continental US only. Please write for shipping rates to HI, AK, PR or international destinations.)
