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10pcs M3 Aluminum Column post M3*6/8/10/12/15/20/25/30/35/37..100mm Black Aluminum round standoff spacer Spacing screws RC Parts - AliExpress

0.257 in. ID 0.500 in. OD 1.500 in. Long Aluminum Spacer - AndyMark, Inc

Use this Double Tee Nut to connect V-Slot and most T-Slot Extrusions end to end or use it on any connection point that has 20mm spacing (for example,

Double Tee Nut™

M6 x 18mm O/D x 20mm Length Spacers - 6082 Aluminium Anodised Black

Decorative Spacer Peak Aluminum Railing - Peak Products (USA)

Hardware

The Thin Hex Nut is affordable and works great with the OpenBuilds Low Profile M5 Screws. We include a Thin Hex Nut with each Anti-Backlash Nut Block.

M5 Thin Nut

Aluminum profile 25x14 mm for silicone sleeve - 2 meters

ZTPA2572, Cover mat/diffuse for profile S, Cover SMALL, Länge 2m

Spacers

H-Alpha Emission Filter 656nm 20nm Bandwidth Narrow Band Pass Multiple Sizes With Frame For Camera Telescope Astrophotography