8585K43 - Polycarbonate Round Tube 1-1/2" OD, 1-3/8" ID, Clear = $3.48 for one Foot

4880K314 - Std-Wall (Schedule 40) White PVC Pipe Fitting 1" X 1/2" Sz, Pipe End Male X Socket Fem, Hex Bushing = $0.74 Each

91780A131 - Aluminum Female Threaded Hex Standoff 1/4" Hex, 3/4" Length, 6-32 Screw Size = $0.44 Each (5) = $2.20

93505A111 - Aluminum Male-Female Threaded Hex Standoff 3/16" Hex, 1/4" Length, 6-32 Screw Size = $0.44 Each (4) = $1.76

90309A154 - Zinc-Plated Brass Unthreaded Round Spacer 3/8" OD, 1/4" Length, #6 Screw Size = $0.59 ea (2) = $1.18